yea mod chip works with any firmware, check your mobo tho and you should be good to go, now make sure again you know what you're doing about installing it (if you're going to do it by yourself) :P and good luck, wut's ur story btw of upgrading to 3.51.
Well my 3.51 story is basically...I didn't know homebrew and ISO were played only on older FW or custom FW. I'm pretty new to this stuff -- basically pulled my 1.5 PSP out of the closet the other day from a year ago and just started updating. Just as I got my update...I found the thread that said ZOMG DON"T! So oh well, live and learn. I just ordered a 3.10 that I should have next week. 3.1 > 3.5 > Lumines to 1.5 > 3.4OE. I'll be back in the game soon :)