How many times can a PSP be downgraded to 1.5

Im still new in this homebrew stuffs,just wanna know whether how many times a psp can be downgraded from firmware 2.0 to 1.5 coz when i bought my psp 2 weeks ago it came with firmware 1.5 and also purchased a UMD game GTA (Liberty City Stories) the game needs firmware 2.0 to run so i updated my firmware to 2.0. after i found out that there's lots of homebrew games available it was a waste i upgraded to 2.0 so if i downgrade to 1.5 and then if there are new titles that requires firmware 2.0 i need to update again to 2.0 how many times can i downgrade and upgrade is there a limitation to it.

whenever you downgrade you have a chance to brick your psp but i been wondering that myself because i had to update (Damn GTA).

ive done it twice so far and everthing works fine just as long as you always do everthing right when you downgrade you should have no problems

but a guy on psp-hacks.net says that he downgrade the psp 30 of more times and then he brick the psp

I'm downgrading right now. It's probably my 5th time or so. I haven't seen any problems yet:)

where can i find a legit downgrader?

you can downgrade as many times as you like. It should not brick your psp, so long as u use the right downgrader. But there are certain downgraders that are specificaly made for bricking your psp. Beware as the file and the name of the bricking downgrader is the same as ordinary downgrader.

I'm fairly certain it's just the one (trojan) that bricks it. The MPH one is fantastic.