This is a tool which patches trial arcades to full arcade games.
Extract a arcade from your 360 hd or download a trial arcade game from usenet.
Open up Yaris-Swap.
Hit open file browse for the arcade game you just extrated/downloaded.
Click "hex mod - yaris swap" now the game will hex-edited to a full game.
Now you can burn the game just make sure the content folder is in the root.
Burn to a CD, put in 360 and it will come up as a mixed media disc.
Go to game libary and the game will be there as a FULL arcade game.
Requires freeboot or XBReboot, for tuts go on xboxscene not for the average noob.