Is there a psp homebrew program that starts iso games that work with half byte loader (HBL) ?

nan

if the format is cso then it should be 600Mb instead. PSP games come in iso and cso format so don't worry about it.

YES!!! okorder and install that by moving the eboot folder to ur PSPs game folder and create a folder in the memory stick root thats called ISO and put the ISOs in there! :) Have fun!