like its been said up there...

homebrews should be added in your PSP\GAME folder only
psp games cso/iso/ciso will only be in ISO folder

for this case, it's called Homebrews. so basically this has to be in the GAME folder, not ISO folder or else you won't be able to start this.

if u really really still do not have any idea on how to do it, try searching up a guide, should be around here somewhere but i guess this is pretty simple. The rest of it, is up to you.

rep+ me if i helped