How do I save game progress to PC when I remove an app?

[underage17]

I have games like RR2, MC3 and NFS Most Wanted on my iPad but the problem is, its a 16 gb variant. So every time I have to install an app, I have to delete another one to make space. I want to save my progress either to my PC or my iPad itself so that if I reinstall an old app, i don't have to start over.

I don't know if its against the forum policy to mention this, but my iPad is jail broken, so I do have access to all files, but I need to know exactly which ones to back up in each game (at least in the aforementioned games)

Anyone know?