Wed Aug 23, 2006 7:14 pm by Mailas
newpspdude, welcome to pspbrew.com! I see you're a new comer.
Anyways, mostly, when you downgrade pspdude, youre VERY likely to brick you're psp, since that psp may have a TA-082 mother board on it.
To check, just go to im_on_the_computer's link and go to the back of you're UMD drive and look for what it sais on the picture posted above. If whats there is there, its a TA-082 motherboard, enabling you to brick you're PSP while using the downgrade Dark_Alex gave out.
If its not a TA-082 mother board, then you can downgrade without bricking you're PSP.
You're friends PSP's however were not TA-082 motherboards (which is good) so that explains why they were able to downgrade.
Again, welcome to the site.