Can I use a Verizon Iphone 4S on Sprint network?

My friend wants to sell me her Iphone 4S for cheap but she is with verizon and I'm with sprint. I know sprint and verizon are both CDMA or whatever. So can I just take the Iphone 4s to the apple store and have it switched over to sprint?

FUN QUIZ/SURVEY PART 3022! GUYS WE DID IT

1) Britney Spears, Christina Aguilera or Mariah Carey?
2) X-Factor, The Voice, or American Idol?
3) Chris Brown, Ne-Yo or Usher?
4) Snooki or J-Woww?
5) You Always Eat:___?
6) Summer or Winter?
7) Nicki Minaj or Lady Gaga?
8) Android or iPhone?
9) Music or Movies?
10) What you ate today: ___?

BONOUS QUESTION!:

If i just gave you $210, what would you spend it on?

Apple Device Driver not installed?

I'm assuming this is the reason why iTunes refuses to acknowledge my iPhone's presence:/

I'm running Windows Vista--I know, I know, this operating system sucks. But it won't allow the installation of every component in iTunes. Namely, Apple Device Driver. So I don't know what to do about this. I have to connect my phone, but it's not going to work unless I have that piece if Apple on my Computer and my computer apparently has an guest list, and Apple D. D. Is not on it.

Why do so much people have iphones?

I see iphones everywhere i go, everywhere i go. I saw at least 5 of them today. There are so many smartphones out there that are way better and are basically the same thing, so why iphone? And NO i'm not jealous of them cuz i have a smartphone myself. It looks like an iphone but its better quality and has more features, cheaper, etc.

How to put iphone 4s in demo mode?

I work in a phone store and we just got the iphone 4s. I'm trying to put it in demo mode but I do not know how to. It has been put in demo mode previously by accident so I know it is possible.
It is an iphone 4s from virgin mobile it is not activated. Best answer will go to first correct answer.