That will be nowhere near im afraid. For optimal conditions 2-3+ gigs is reccomended
yes!but laggy
no
If it will run on Vista, it will run on 7. So, yes is the answer.
No, even if you could it would run really slow.
yes it will run the sims 3 very well
No, you can only walk or run, there is nothing to ride.
Nope. Fallout 3 and Fallout: New Vegas are completely different games, sure they are in the same title and the same game engine, but the configurations and in-outs are different for both games, so you cannot simply apply a mod you used for Fallout 3 and try to run it on Fallout: New Vegas. You may be able to find mods that match your Fallout 3 mods for New Vegas on an assortment of different websites all over the net.
Yes, 1GB will run this. Matter of fact, 128 MB of RAM will suffice to run a Pentium 3.
It will barely run Fallout 3 and won't run The Sims 2 in any meaningful way. My guess would be no.
Occasionally Fallout: New Vegas will freeze, but not as frequently as Fallout 3.
512MB RAM, 1 GHz CPU RuneScape HD: 512MB RAM, 1.5 GHz CPU, 64-megabyte 3D Graphics card, such as Nvidia® GeForce™ 3 or above Input: Keyboard, Mouse Java Runtime Environment (Latest now i'm afraid)
There is no such place in fallout 3.