Since it's a fatfuck psp I would go to 3.52 M33-4
Download and install these in order,
3.52 M33
3.52 M33-2
3.52 M33-3
3.52 M33-4

Also after you install all of those you can go to 3.71 M33>3.71 M33-2>3.71 M33-3, but you must install 3.52 M33-4 first.
If you want 3.71 M33-3 download and install these in order,
3.71 M33
3.71 M33-2
3.71 M33-3
1.50 Kernal add-on

[All links from Dark-alex.org]

p.s. Welcome back. =]

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