PSP 1002 version 4.05 need help

[handoi1560]

can i downgrade it to 1.50, change to cfw and hack to play game ? if it possible can you show me how can i do that??
Thanks

[BrokenRoses22]

You will need to updade to OFW 5.03 and install ChickenHEN R2.
Follow this guide and once you have 5.03 chickenHEN installed just update to 5.50GEN-D3 Prome-2
http://www.pspmod.com/forums/softwar...kable-2ks.html

[handoi1560]

but that for 3k, my psp is 1k. how can i do that??
when i try to do that, it's a step :
Go to System Config→UMD Autostart & UMD Cache, switch both to [off]

but i can't find the UMD cache. Is that in psp 3k???