QUOTE(jamie118 @ May 12 2007, 02:49 PM)

the best (safest) way to do it is to upgrade to official 3.03, and use an unpatched copy of gta:lcs to downgrade. it worked for me, at least!
I would not recommend upgrading to 3.03 if you are at 2.60, because going via 3.03 requires a (relatively rare these days, unpatched GTA:LCS UMD), and is no safer than downgrading from 2.71 or 2.80 (which don't require an unpatched GTA:LCS UMD).
From 2.60, I would recommend upgrading to 2.80, then downgrading using the improved noobz.eu 2.80 to 1.50 downgrader. evol edo has already posted a link to my outline guide for doing this, but I'll post it again anyway:
http://www.psp-spot.com/forums/index.php?s...mp;#entry208480Many people on here have followed that to successfully downgrade and get to 3.03 OE-C (custom firmware).