At the fallout 3 website (www.bethsoft.com) download the geck to make mods!
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
there are no PC mods for Fallout 3 on PS3. Why do think they call it Personal Computer
You can't use mods on Mac or iMac, it only works on PC.
If you are asking for an X360 version, it is not possible. But for the PC if you go to where it is installed you will find a folder called Data, put your mods in there. for help loading mods, use Fallout Mod Manager, because certain mods require other mods to launch first. E.G. A companion mod i made, called 4 New Companions, that had to be loaded after RRcompanionVault.esm
Sorry, but there aren't any "cheats" in Fallout 3. There are, however mods for the PC version but that is all. Also, there are glitches to get more caps and such that can be counted as cheats if you want.
i dont think you can get mods on consoles, only PC im afraid. :)
just mods basically
fallout3nexus.com
Yes.
Unfortunately no. The PC version is the only one that can be "modded," though you can Hex Edit the Xbox 360 version.
Absolutely not. The xbox uses a proprietary operating system that is incompatible with mods made for PC.
You don't. It does not exist in fallout 3 without the use of the console and mods. ( Only for P.C )