Try working on a "mod"--a program that allows players to edit and modify certain parts of an existing game.

FORBES: Magazine Article

The graphics haven't been completely updated (the cars are basically still just standard polygons), but the UI is cleaner, a physics engine has been added in with power-ups and other goodies, and there is a really robust replay system, which lets players save their best shots and stunts on video, and edit and upload those to YouTube and other video sharing services.

ENGADGET: blogger-avatar

Thanks to the internet connection built into all HD DVD players, Toshiba machines allow users to do all sorts of nifty things like re-edit films, participate in online polls and download trailers.

ECONOMIST: Can Toshiba��s David topple Sony��s Goliath?