Depends on what kind of things you want on your game
for addons, and Maps get them off of GarrysMod.org
Heres how you install them
Program Files > Steam > SteamApps > YourUserName > GarrysMod > GarrysMod > Addons
Program Files > Steam > SteamApps > YourUserName > GarrysMod > GarrysMod > Maps
Garrys Mod 10 Is available on Steam, Which can be found at SteamPowered.com You First need to get a Source Game, which can also be found on Steam, that is including Counter Strike: Source. All and all it should cost about 21 US Dollars.
put it into your computer then download them onto your hard drive then download it onto your card
yes jou can
once you download the game go to file in the emulator choose load game and click the game
You can download games onto it if you own the game.
It is impossible to download a game-boy game onto Pokemon platinum
Without a PS2 with a Harddrive there would not be a place to store the download
You go onto the game's website, and there should be a downloading link. Usually games that you have to download, after you register, ask you to download the game.
no you can not
There is the R4 and the CycloEvloution.
angry birds
No, you download them straight from the PSN using the PSP.