need help on 2.0 downgrader.

hi, I have a psp version 2.0 and i followed the sticky post instructions on installing the 2.0 downgrader. Once i got to installing the 1.0 to 1.5 upgrader i got an error stating the update failed, contact the sony computer entertainment technical support line for assistance (ffffffff). I'm scared to turn off my psp right now its just frozen there, any ideas would be truly appreciated thanks. and this happened once it got to 99% installing. the guide says that "The psp will now do a faily length restart just let it play out. Now one of two things will happen either the PSP will restart or it will turn off. After the LED goes off and the psp has turned off.. Wait 10-15 Seconds and power the PSP back on. You now have a 1.50 PSP, Congradulations." It has been like 4 hours now and it still hasnt rebooted or turned off, should i manually turn it off myself or wha should I do?

nevermind problem fixed thanks to indian cheese, thanks a lot man.