Okay good, if you have a 1.5 I would like you to get something called Devhook.
This will let you run a certain file called an ISO which is the data from the UMD. Basically speaking its basically the UMD except its the file of whats in the contents of the UMD, meaning you can play it withuot the actual UMD. But you will need to put a UMD in, but dont worry, it can be any kind of UMD.
First, what devhook is, is a really cool application that will let you run ISOs. To install Devhook, you can look at my
easy-to-use tutorial which is located
here.
Once you have installed it on you're PSP, simply get the ISO.
If you want to get some good iso's, you have to use something called torrents.
PM Me if you need to know how to get the ISOs.