Brewology

Hey guys, it's been awhile. Sorry for posting this, since I'm sure there's forums already on this subject, but I'd like some help nonetheless. PSP Scene was quiet when I was last around, and suddenly there's an uproar of new firmware's out. I'm currently on 6.20, using a CHA PSP Slim (2000). I have the TN Homebrew Enabler, so I can still play emulators and whatnot but I have to run that first.

So, here are the questions:
What is the current permanent PSP Custom firmware for my CHA PSP?
How would I get to that?

Thanks in advance guys, I know it's been a few months but I have a trip up to Baltimore tomorrow for a robotics competition and I'd like to get this out of the way before I have to leave at 5:00 AM.

5.00 M33 is the best. Of course it's old, but has all of the features of newer firmwares and can play games that require any firmware.

Ah come on crait, still preaching the 5.00?
I admit, that's the best, but I'd still at least like to -see- the shiniest thing out there at the moment.

Lol. By the way, Welcome back!

Thanks. And I guess I'll just use Hellcats and get back to 5.00. Is it safe to run that from 6.20 TN-C?

Haven't heard anyone wanting to try that before. Not sure, sorry.

Eh, I started following this instead to get back to 5.00 M33 as you said.
http://wololo.net/talk/viewtopic.php?f=21&t=1271
But, HEN isn't working out for me. I know my PSP is CHA, but mine'll just crash instead of hen-ing (?)
Any other way to get from 5.03 to 5.00 w/o Pandora?

Can you not self-sign the homebrew? http://wololo.net/talk/viewtopic.php?f=17&t=1897

Ah derp. Mad props to Geo and his crew, totally forgot 'em.
--Edit--
Signed HellCat 1.6 won't run =/ Ah well, back to 6.20 TN for now, gotta get to bed so I can wake up at 4.