[sinphaltimus]

Homebrew must load from the appropriate homebrew folder (psp\game for non 1.5 homebrew (mostly true) and psp\game150 for 1.50 homebrew (mostly true unless you use an eloader or timemachine).

ISOs need to be coded differently (like official singed sony code or something). There is one homebrew out there (maybe UPMS or something) that comes as it's own iso homwbrew. Not sure how they pull that off unless it is coded to some Sony specification.