How to unlock iPod touch 4th gen, without losing data?

So, I'm locked out of my 4th Gen iPod touch. I've been searching for a way to unlock it, since I was pranked and the person who pranked me forgot what they changed the password to, and I'm never going to be able to guess it. I would just use the features in Find My Ipod, but I'm stuck in airplane mode, so it doesn't work.

Short of resetting or jailbreaking, I couldn't find any way to get it unlocked. I'm hesitant to reset, because I have data(such as DLC from discontinued apps) that I won't be able to get back if I wipe and reset. As far as I can tell, the iTunes backup/restore thing doesn't back up the apps or save data from the apps, or at least I haven't seen anything definitive that says so. Jailbreaking I don't think I could do if I wanted to, since from what I've seen I'd need a firmware number that I can't get to.

So, is there any way to either disconnect from airplane mode, or reset the password while I'm locked out, without resetting? I don't want to reset unless there's no other way.

Also I'm running iOS 5.1.1 if that makes a difference. Thanks!