PSP CFW help!

So I used to know the ins-&-outs of the PSP world a few years ago (even had a pinned thread here on WBB on how to do it), but I have lost touch since work and just generally being an adult caught up. I moved a few months ago, and found my PSP lost in some random spot… Time to play again!
Ok, so I have an original fat PSP that’s running CFW 5.00 M33-6. I did some research and saw that the current OFW is 6.60, and that there are a few CFW I can use. I couldn’t figure out how I could possibly update from the ancient CFW I have now, I would rather not brick it after getting myself excited looking ta the list of recent games that came out, lol.
Where do I start in this updating process? Thanks to whoever can help me out!
Answer #1
Gen of your psp?
Answer #2
You can go from 5.00m33 to 6.60ME, I went from 5.50GEN with no issues.
Think the current version is 6.60ME 1.6.
Answer #3
Jack_Torrance replied: Gen of your psp?
Original FAT PSP (1000 I believe). What is the difference between PRO and ME? Do upgrade to OFW then the CFW, or just straight to CFW?
Answer #4
6.60ME is easy enough, download OFW and copy over the modified eBoot and install, might be a little more to it but it’s all laid out in the instructions and very easy to do.
Don’t quote me on this but I think PRO is for PSP’s that can’t be fully modified so if you turn off the PSP you’ll have to re-enable the PRO CFW, ME boots with the PSP like regular FW.