cso files won't

Oh ok, not sure what to tell ya. If you can play ISOs you should play CSOs. Try Google-ing it, you might find someone else with your problem.

Ya that is how I found this site LOL

WOW!!

Must have been a radom format issue ???

Seems to work now but for giggles I tried a different 4 GB card and it did not work with a any CSO. It took 2 or 3 full formats plus using the PSPs built in format and it finally worked so it might be a card issue.

There was no different from copying as apposed to drag and dropping

Thanks for the hint 45PERCENT!!!