flash1 is just all your settings, you can delete the whole of your flash1 and your PSP will still run fine, but you'll get a BSOD on first boot and it'll ask you to re-enter your settings.
PSP, all the way from 1.00 to 5.50 GEN D2 - DS Lite w/ M3DS Real (M3 Sakura v1.34)
PS3 3.01 - iPod Touch 2G 16GB Jailbroken - Xbox 360 60GB - PC, Q6600, 3GB DDR2, GTX260 (216) 896MB
since we are on the topic of FLASH0 can either one of you tell me how to FLASH Cwcheat onto the FLASH0 file and make it work because i cant do the memorystick trick because i have a LEXAR mem. stick