I know how to chmod files on a server via FTP but these are local files. I just installed WordPress and an e-commerce theme on a localhost via MAMP. However, when I activated the theme, it said I need to adjust the writing permissions to chmod 0777 of a few folders (bills, dl, uploads, and cache). I've seen a few different Terminal command lines recommended to chmod but I'm not well-versed in Terminal and I don't want to screw anything up. What do I need to do? (I'm running OS X 10.7.2) Thanks