I really need help finding out what this corrupted data on my memory card is...
If I erase it, will it delete everything on my memory card??
I haven't hacked my Ps2 or cheated...

Sorry to hear that, but unfortunately, sometimes this just happens, I've heard about it before and everyone who told me has ended up deleting all their saved data

It sucks I know

There are a few programs that can attempt to recover some files, but no promises.

http://www.aumha.org/downloads/restoration.exe

That's one I use... I would get a card reader and pop it in the computer, and use that program.

So it might save some things??

I've only saved two things on it... and it's all already corrupted