I don't mean to be an ass but how exactly do you get anything "Fallout" from GTA San Andreas? Also, first link ain't working for me. I mean, if I wanted to play Fallout online I'd just go play FOnline. GTA San Andreas, mechanically and visually ain't exactly screaming "Fallout" to me.
Well there's modding to get fallout styled weapons and skins if you want, our server mapping is that of a wasteland (The mapping is really good you'd have to see it to believe it) It's also not really trying to be Fallout Online, it's a roleplaying server based in the Fallout World where you live out and portray a character. It's less about looking exactly like Fallout and more about roleplaying and using your imagination.
The server also has unique scripting that features survival elements such as hunger, thirst, radiation levels and looting etc etc. Factions and organizations can also be formed. The script is adjusted to scream "Fallout" at you.