So I've done quite a bit of reading around the net, and gone through this thread, but im strugging to get a definitive answer, hence this post
My PSP slim 2002 (yellow Simpsons edition) was sitting unloved on a shelf for a few years, and i recently dusted it off and re-discovered the joy

However, some of the more recent games I've tried to run are throwing the dreaded
80020148 error. So I am assuming i need to perform an update to get these games to run
I'm currently running
5.50 GEN-D2. I did find some websites that said i could just go to Network Update via Settings on the XMB to get updated, or there are some options in the recovery menu ("Use M33 network update" for example). But I'm wary of just jumping in and doing this - one never likes to tinker too much with a system thats working (for the most part). But i'm also quite keen to play these newer games
i did already notice that my version.txt was set to 9.90 - ive since gone and changed that back to 5.50
So i guess the real question is, whats the best/easiest/safest way for me to get this CFW updated? should i just follow the procedure at the start of this thread? Or is there a better path one should take?
Though i cant be 100% certain (as i first loaded the CFW on this PSP many many years ago) I'm pretty sure this PSP is perma-hacked with a Pandora Battery - not sure if that makes a difference or not...
Thanks in advance for the help!