For the PSX eboot, you'll probably need a popsloader.

What ISO driver are you using? sony or M33?

EDIT: Have you tried using it on AC Power only?

 

POPSloader is a plugin for PSP to run PSX1 eBoots. Essentially, you just need to download it (try google for locations) and then stick the "seplugins" folder into the root of your MS. If you already have a "seplugins" folder with other plugins inside, you'll need to modify the "POPS.txt" file to add a line for POPSloader, but this will usually be covered in installation manuals.

Currently there are 2 versions, one for anything up to 3.71, and one for 3.80 and above (CFW only). In either case, installation is the same (as far as I know), as all it needs is the "seplugins" folder to be in the root and the popsloader plugin to be enabled in the recovery menu.

Note: the point of POPSloader is to correct many bugs that are in the CFW releases due to different programming techniques (of which I know nothing about). Some games work better with 3.10 poploader and fail on anything higher than 3.40 (like breath of fire 4). Some games (like the final fantasies) will not work on anything lower than 3.71 (3.80 and above are not supported in poploader - see related support forums for details). Every game works differently. Here's a compatability list to help you: http://www.gamerspress.com/index.php?title...patibility_List

 

I spent 5 days of the last week searching the internet and tinkering with my PSP to get it all working. I also spent half of yesterday tinkering with CWCheats to get that to work with popsloader (to make monster rancher 1 and 2 worth playing). This is the only reason why I know as much (for a new member).

Still, glad I could help