| the 2.6 downgrade leaves your psp with the 2.5/6 flash0 files that aren't in the 1.5 firmware, i had same problem with umd drive after upgrading to 2.00 and mph downgrading, not had a single problem and all the extra files are gone.
__________________ Black PSP 2.71 SE-C EU 
Black PSP 3.71M33-2 EU
Black Slim PSP 3.71M33-2
Nintendo DS + M3dssimply
Nintendo Wii + Wiikey
Xbox Self Chipped, Xbox 360 NME Self Chipped
Ps3
1GB Sandisk MS Duo, 2GB Sony MS Duo, 4GB MS Pro duo, 4GB Datel Harddrive
Grand Theft Auto LCS
Grand Theft Auto VCS
3600mAh External Battery
+Plenty of Homebrew |