The Tiff exploit is very pointless if you have a downgradable 2.60.
The games are VERY limited on the tiff exploit and dont always load first attempt.
Go on down to: www.psp-hacks.com and go to the dowload section.
Seach for something called "easy downgrader 2.5/6".
This will do all of the work for you and therefor no chance of bricking.
If you need any help just PM me and i'ld be happy to help you on MSN.

Thanks
PSPv1.00

__________________