Go to your inventory and click the mod you want to use, it will install provided you have the mod slot available (unlocked), this only becomes available as you level up and complete the required tasks.
Your mod slot is the third slot of the three on the right hand side of your inventory page, just below the Shield and Granade slots.
No, you cannot install mods on the 360. You need the ps3 or PC versions to install and use UT3 mods.
no you can't, mods are for PC only.
Just to let you know you can only get mods on the PC version
Yes, you can download and install mods on the PC version of Minecraft, there are several gun mods you can apply.
Yes, you can install Fallout 3 PC mods from Fallout Nexus onto the PS3. For a tutorial, see: http://fallout-mods.blogspot.com/2010/11/fallout-3-mods-for-pc-on-ps3.html
Search Yahoo/Google/Bing for "Minecraft Mods". Read the instructions on what and how to install them and see if they are compatible with the other mods your going to put in.
mods, mods, mods
Google for Modstallation. You can use that software to install mods.
Check out the link below for a guide of how to install mods in Minecraft.
It might not be out yet but it should be. You have to download and install forge then you can install mods by going to .minecraft/mods and adding a mod there.
The PS3 will not play PC games and PC game Mods will not mod a PS3 game.
You need to find mods for this on the PC (computer) and implement them into the game, there are usually guides on how to install them when you find them.