Hitman: Absolution's Contracts Will Be Cross-Platform… With A Little Hacking

Hitman: Absolution has a new mode allowing user-created levels to be uploaded called "Contracts".
Unfortunately, you won't be able issue any cross-platform contracts. Not officially, at least.
Here's the mode's latest trailer:

Essentially, you can make the levels you design and challenge your friends with cross-platform. You just need to do a little file hacking.
Each contract is expressed as a string of digits. The first two digits are the platform the contract is available on: 03 for PC, 05 for Xbox 360, and 07 for PS3. The rest of the contract is then expressed in digits.
In short, if you know what you're doing, IO Interactive has made porting those contracts fairly easy to do. The trade-off, of course, is that there's no simple way to get, say, an Xbox 360 contract up on a PS3 without some more work. It also won't carry over challenges or other aspects of Contracts mode; you still won't be able to see statistics cross-platform.
But at least they've thought about it so that for those of us who want to try it out.