Help getting homebrew game pang to run on v 2.5

I am having trouble getting the game pang to work on my psp 2.5, i have downloaded pand02 and pang03 and i unziped the files there are 2 files 1.0 and 1.5 and the instructions are in spanish or something. I didnt really know what to do so i put the two files into my psp/game folder and when i run my eloader from GTALCS pang is up there with my other games but there are two of them, and when i go in to the first or second i get a error message telling me to run pang from its folder or a folder. I know this game works on 2.5 cos its on fanjitas site as one of his favourites and it has it down as working on eloader96 and my friend has it running on his 2.5 but i dont know why it wil not run on mine. Could some one please help me try to understand why this wwont work as almost all my others homebrew games work perfect except for galuxian,beats of rage, Throttle X and doom. Any help will be a great help to me understanding why i have this problem. Thanks ppl