I used PSPLink on my PSP3000 with ChickHEN succesfully, but I was wondering if there are things/commands that shouldn't be used ? (stuff that would mess with flash, or , more likely, stuff that would mess with the HEN itself ?)
psplink is pretty much a debugging program designed for hombrew devs. psplink itself doesnt modify any files but you are able to brows the Flash0:/ , 1:/ , etc... As long as you dont modify the Flash files, you should be fine.