256w ago - I've decided to write this tutorial because I had some trouble with PS3 SAK and Windows sharing.
First off, you have to go into the control panel on your P.C., double-click on folder options, then click on view, and all the way at the bottom of the addvanced settings there is an option called "use simple file sharing" uncheck it and click apply and ok. This will enable you to share files between your PS3 and your PC!
Next thing you need to do is create a file on your PC (whatever you want, GAMES, PS3, anything) than right-click that folder and go into properties. From here, go into sharing and click 'share this folder' then click on permissions and click "full control". Make sure you apply all settings before exiting.
Ok now boot up that old PS3 Swiss Army Knife for step #2. Choose option 3 (Windows Share), and put in your IP address. You can get your IP address by simply going into control panel again, go into "network connections" dubble click on "local area connections" and then on support, and all your IP information will be right there.
Now it will ask you for a folder name.. put in the folder that you enabeled for sharing (duh). Then it will ask for user name (your Windows user name) and your Windows password....