Restore Default Settings on a downgraded 1.5 PSP??

Okay, I got a downgraded 1.50 PSP. My question is, what would happen to my PSP if I decided to Restore Default Settings? What would I lose or gain? Will it restore it back to the original 1.51 fw, or will it simply make a clean swipe of my PSP settings?

nope. Its ok man. It will just set the date, set the time and everything. Don't worry about it, oh and also set the name of your psp(its probably going to say PSP041 or something but you can name it to whatever you want) also your time zone and stuff.

nope, your stuck with 1.50, so no worries