if you've just arrived here and are having trouble running PSPSeq
because you don't have custom firmware, i'd recommend checking this
site out:
http://www.darkmessiah.byethost13.com/freeservice.html
it's a list of people that will program custom firmware for free. i
went to the guy in boston to get mine taken care of and i didn't have
a problem at all. of course YMMV, but if you don't want to deal with
ebay or craigslist or trying to parse all the information out there on
how to do it yourself, this is definitely worth a read.
once you have a homebrew enabled PSP life's a lot simpler (updating to
the latest versions and making your own Pandora's Battery is simple)
but making the initial jump is definitely a bit of work.