I don't remember where exactly but I saw this in another post about NOT signing into PSN until whatever game you are running asks you to sign in to fix freezing/crashing problems. I used to crash, I turned off auto sign in and i'm using gaia 2.04 with the lvl 2 patcher built in with discless support. I have not frozen or crashed since I turned the auto sign in off.
I can also play a game for a while. quit back to xmb, reload gaia, switch games..so on and so forth without freezing, for those of us that want discless mode you can try this since it works for me. I also am using a 256mb nand CECHE01 80gb phat.
Also most of the games I have installed run discless with the exception of LBP2 and need for speed hot pursuit.