me and my family are looking to get the fios tv and internet and also the phone..i have a few questions..first how does this get hooked up whats the process of installation, currently we have cablevision
This should probably answer your question.
http://www.bricklin.com/fiosinstall.htmcan i use my zyxel x-550 wireless router or we have to use theres? 2 of my computers are wirelessly connected
Verizon uses the Actiontec router. You will have to daisychain your router with the actiontec if you want to use your router. The actiontec is a wireless router. You will have to google it for more info. I am too tired to look it up.
if we have to use there router can i setup port forwarding on the router they give you
Yes
download speed and upload speed is important to me since i use bittorrent how does fios internet work with bittorrent any problem do they work smooth and fast?
Same as any other provider. I have not heard of any problems using bittorrent.
with the phone would we be able to keep our phone number that we have now
Yes. Fios is still basically the same service except the signal goes over fiber instead of copper.