Ok as some of you alread know, I am waiting for xmas to hopefuly get a gp32 (which will be the best gift ever!!). Anyways, so I was looking around at the games you can download, adn I found the doom game people talk about a lot. It looks awesome! But its a port, and I heard all this mod stuff about it, and I'm wondering, do I have to own the actual game to play this one?