well, this is correct ---> ms0://PSP/THEME/mytheme.ctf
and enable the plugin from the recovery menu..
1.) Well, there wont be any issue, till the time u use ORIGINAL Sticks.
2.) There are NO cheapest and costliest rates for the PSP, it has jus one Official price OF Rs.8990/-
3.) U can purchase:
-- a crystal (plastic hard case) case for the PSP or,
-- a PSP pouch so as to safeguard ur PSP against any scratches,
-- U can buy a PSP screen protector known as SCRATCH GUARD wich can be applied ontop of the PSP screen.
THe charger+battery comes along wioht the PSP pack, so u need not buy it from anywhere else..
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Cheers n e-peace...