diff --git a/lib/wrench.js b/lib/wrench.js
index 6cfa8c6..268df1b 100644
--- a/lib/wrench.js
+++ b/lib/wrench.js
@@ -121,6 +121,8 @@ exports.readdirRecursive = function(baseDir, fn) {
 
 
 
+
+
 /*  wrench.rmdirSyncRecursive("directory_path", forceDelete, failSilent);
  *
  *  Recursively dives through directories and obliterates everything about it. This is a
@@ -156,6 +158,62 @@ exports.rmdirSyncRecursive = function(path, failSilent) {
     return fs.rmdirSync(path);
 };
 
+
+
+function isFileIncluded(opts, dir, filename) {
+
+    function isMatch(filter) {
+        if (typeof filter === 'function') {
+            return filter(filename, dir) === true;
+        }
+        else {
+            // Maintain backwards compatibility and use just the filename
+            return filename.match(filter);
+        }
+    }
+
+    if (opts.include || opts.exclude) {
+        if (opts.exclude) {
+            if (isMatch(opts.exclude)) {
+                return false;
+            }
+        }
+
+        if (opts.include) {
+            if (isMatch(opts.include)) {
+                return true;
+            }
+            else  {
+                return false;
+            }
+        }
+
+        return true;
+    }
+    else if (opts.filter) {
+        var filter = opts.filter;
+
+        if (!opts.whitelist) {
+            // if !opts.whitelist is false every file or directory 
+            // which does match opts.filter will be ignored
+            return isMatch(filter) ? false : true;
+        } else {
+            // if opts.whitelist is true every file or directory 
+            // which doesn't match opts.filter will be ignored
+            return !isMatch(filter) ? false : true;
+        }
+    }
+
+    return true;
+}
+
+exports.copyFileSync = function(srcFile, destFile, preserveFiles) {
+    if (preserveFiles && fs.existsSync(destFile)) return;
+
+    var contents = fs.readFileSync(srcFile);
+    fs.writeFileSync(destFile, contents);
+};
+
 /*  wrench.copyDirSyncRecursive("directory_to_copy", "new_directory_location", opts);
  *
  *  Recursively dives through a directory and moves all its files to a new location. This is a
@@ -165,14 +223,16 @@ exports.rmdirSyncRecursive = function(path, failSilent) {
  *  Note: Directories should be passed to this function without a trailing slash.
  */
 exports.copyDirSyncRecursive = function(sourceDir, newDirLocation, opts) {
+    opts = opts || {};
+
     try {
-    	if(fs.statSync(newDirLocation).isDirectory()) { 
-    		if(typeof opts !== 'undefined' && opts.forceDelete) {
-			exports.rmdirSyncRecursive(newDirLocation);
-        	} else {
-	    		return new Error('You are trying to delete a directory that already exists. Specify forceDelete in the opts argument to override this. Bailing~');
-        	}
-    	}
+        if(fs.statSync(newDirLocation).isDirectory()) { 
+            if(typeof opts !== 'undefined' && opts.forceDelete) {
+            exports.rmdirSyncRecursive(newDirLocation);
+            } else {
+                return new Error('You are trying to delete a directory that already exists. Specify forceDelete in the opts argument to override this. Bailing~');
+            }
+        }
     } catch(e) { }
 
     /*  Create the directory where all our junk is moving to; read the mode of the source directory and mirror it */
@@ -185,23 +245,25 @@ exports.copyDirSyncRecursive = function(sourceDir, newDirLocation, opts) {
     }
 
     var files = fs.readdirSync(sourceDir);
+    var hasFilter = opts.filter || opts.include || opts.exclude;
+    var preserveFiles = opts.preserveFiles === true;
 
     for(var i = 0; i < files.length; i++) {
         // ignores all files or directories which match the RegExp in opts.filter
-		if(typeof opts !== 'undefined') {
-            if(!opts.whitelist && opts.filter && files[i].match(opts.filter)) continue;
-		    // if opts.whitelist is true every file or directory which doesn't match opts.filter will be ignored
-		    if(opts.whitelist && opts.filter && !files[i].match(opts.filter)) continue;
+        if(typeof opts !== 'undefined') {
+            if (hasFilter) {
+                if (!isFileIncluded(opts, sourceDir, files[i])) {
+                    continue;
+                }
+            }
+            
             if (opts.excludeHiddenUnix && /^\./.test(files[i])) continue;
         }
 
         var currFile = fs.lstatSync(_path.join(sourceDir, files[i]));
 
         var fCopyFile = function(srcFile, destFile) {
-            if(typeof opts !== 'undefined' && opts.preserveFiles && fs.existsSync(destFile)) return;
-
-            var contents = fs.readFileSync(srcFile);
-            fs.writeFileSync(destFile, contents);
+            exports.copyFileSync(srcFile, destFile, preserveFiles);
         };
 
         if(currFile.isDirectory()) {
@@ -291,10 +353,10 @@ exports.chownSyncRecursive = function(sourceDir, uid, gid) {
 exports.rmdirRecursive = function rmdirRecursive(dir, failSilent, clbk){
     fs.readdir(dir, function(err, files){
         if(err && typeof failSilent === 'boolean' && !failSilent) 
-		return clbk(err);
+        return clbk(err);
 
-	if(typeof failSilent === 'function')
-		clbk = failSilent;
+    if(typeof failSilent === 'function')
+        clbk = failSilent;
 
         (function rmFile(err){
             if (err) return clbk(err);
@@ -325,16 +387,16 @@ exports.rmdirRecursive = function rmdirRecursive(dir, failSilent, clbk){
 exports.copyDirRecursive = function copyDirRecursive(srcDir, newDir, opts, clbk) {
     fs.stat(newDir, function(err, newDirStat){
         if(!err) {
-		if(typeof opts !== 'undefined' && typeof opts !== 'function' && opts.forceDelete)
-			return exports.rmdirRecursive(newDir, function(err){
-				copyDirRecursive.apply(this, arguments);
-        		});
-		else
-			return clbk(new Error('You are trying to delete a directory that already exists. Specify forceDelete in an options object to override this.'));
-	}
+        if(typeof opts !== 'undefined' && typeof opts !== 'function' && opts.forceDelete)
+            return exports.rmdirRecursive(newDir, function(err){
+                copyDirRecursive.apply(this, arguments);
+                });
+        else
+            return clbk(new Error('You are trying to delete a directory that already exists. Specify forceDelete in an options object to override this.'));
+    }
 
-	if(typeof opts === 'function')
-		clbk = opts;
+    if(typeof opts === 'function')
+        clbk = opts;
 
         fs.stat(srcDir, function(err, srcDirStat){
             if (err) return clbk(err);