Mod an Atari Flashback 2 into a full-fledged Atari 2600

Atari Flashback 2

We're not quite sure of the necessity of this mod since any self-respecting geek already has an Atari 2600 (even if it's at the bottom of their closet), but for the more adventerous among you, has the deets on how to turn your retro-cool Atari Flashback 2 system into a full-fledged and even more retro Atari 2600. As you may know, the Flashback 2 is based on real 2600 hardware, so the mod mostly consists of getting the console to accept cartridges. You'll have to figure out the cosmetic touches yourself though, as they literally left the carts hanging.