I just did it this way:
- extract the 7z files on your computer (www.7-zip.org if you need the software to extract it)
- start xexmenu or freestyle dash on your xbox, so that you are able to connect via ftp
- start yaris-swap on your computer
- enter your FTP details in the text fields (username and password is xbox)
- click "Test FTP", you should see something like this in the log (bottom of the window)
CODE
[19.07.2010 01:25:34] : QUIT
[19.07.2010 01:25:34] : 221 goodbye
[19.07.2010 01:25:34] : bye
[19.07.2010 01:25:34] : ---> Test finished.
- check "send via FTP"
- click "go to folder" and choose the extracted folder
- click "hex mod / yaris swap / options"
the game is now unlocked and copied to your xbox automatically. just start it from your dashboard