Change installation directory

Hey, is there an easy way to move a opencart installation?  I had mine running on a test page and now i'm ready to move it to the full page but when I moved the files over I got the following error message:

Error: Could not write to cache directory!

I looked at the cache file and it doesn't specify a directory for the cache file, any idea how to fix this/move an install location in general?

Check that your config files point to the new filesystem location and make sure that the cache directory permissions allow apache to write to them.

Hey I figured it out.  You need to change the file directory locations in the config.php file in the main install folder.  Thanks for the help on this one everyone who replied/sent me PM's.