PRO an ME are permanent - only on 1000-2000 models PSP - on 300x-E100x is some like 6.20 Perm or Infinity 6.6X (No have that models so not tested but peopol post that is so its)
And PRO version have much more options and compatybility - for my work all on 6.60 PRO-C and have 1x1004 and 2x2004/3 PSP
Update to latest ME2.3 or PRO-C
U have LCFW na CFW in PRO-C or ME always was that
Only when u have 300x-E100x thay arent any method full CFW (Its one 6.20 and infinity now 6.6X to get perm )
But normal u cannot use PERM patch to 300x-E100x only LCFW
But botch CFW are good - ME- Minimal Edition and PRO - proffesional . I prefer PRO-C used form day 1 made of it bakc years ago.
Only ME its good by LEDA - if u wonna run 1.50 very old kernel Homebrews on PRo leda dont work but u cann also run some 5.XX CFW from MSPD to have that support in some app
I never when haved PSP in 2005-2008 years or now - used maybe standbay mode /sleep mode on PSP like one - only for test. When i not use PSP i shoutdown it - for my no use option in PSP or emulator
my psp go doesn't have permanent cfw (6.60, i dont want to use infinity since it has a brick risk even if it is low), plus even if it had permanent cfw, wake up from sleep is very fast, much much faster than boot, i would still prefer sleep. So when i play outside, i just slide in psp go when i have work, slide it out when i can play back again. Perfect.
for example, 3ds drains a lot of battery when it is in sleep, luckily psp/vita's sleep mode is batter friendly.