Question about PlayStation Store DRM

Say I wanted to delete a game from my memory stick in order to make room for another. How many times would I be able to re-download it? I heard there were DRM restrictions that prohibited you from downloading games more than 5 times on different machines, but does apply to your own machine? Or could I theoretically delete and re-download my game an infinite number of times?

Thanks.

what sort of games are you talking about?

Well I bought Syphon Filter Dark Mirror (1GB) from PSN and back the file up on the Media Manager, the file on the computer will stay until you delete it. Transferring is faster then downloading the games (or anything) from the store, sometimes the transfer will work but when you click on the file on the PSP it will say "Copy write information invalid" (it's from a different system update, maybe) so just download t\it again from the store also you can download the game as many times as you want on the same PSP.

Hope this helps