Formatting Mem Card

[XmemphistoX]

Hi i have the official 8 meg sony card. Is there anyway other than AR2 to format it? I dont want to buy AR2 just to format the darn thing. Heres my problem

My memory card is full, when i try to delete some files through the browser itll crash when trying to load the pictures for the saves I have.

Unforunately I dont know which is the bad save. Does anyone know a game where you can delete saves from other games too?