You need firmware 2.0 in order to downgrade. Please upgrade to 2.0 and then I will help you downgrade. I don't thin ther are any 2.0 upgrades around here, but i have one.
download the downgrader herehttp://mphwebsite.tuxfamily.org/index.php?program=9 and you also need to upgrade to 2.0 then u need to download the 1.5 eboot from pspupdates.com or psp-hacks.com then follow the instructions in the readme
I JUST WANT TO THANK D3VILSADVOCATE, MONKEYMAXIMUS AND PSPORTABLEV2 FOR ALL THE HELP THANKS AGAIN AND IF SOMETHING GOES WRONG OR I MESS UP I'LL ASK 4 HELP.....