Put your Geek Hat on
Another option - probably easier
You can stream Netflix directly to your xbox
http://www.xbox.com/en-US/live/netflix/default.htmOr you can use it as a media extender (Must have Vista premium or Windows 7 premium)
http://support.xbox.com/support/en/us/nxe/xboxlive/troubleshooting/NetworkHelp_mcxpc.aspxYour Xbox should hook up to your projector just like it does to your TV. Common types of connections are
S-Video - single cable (black round end), you will need to hook the audio up with seperate composite cables
Composite - normally this has three cables - red (left audio), white (right audio), yellow or black (video)
YGRB - this is normally used for Hi Def two flavors 3-cable (common) 4-cable (unusual, but out there), you will need to hook the audio up with seperate composite cables
HDMI - newest type of connection. Single cable
from low to high in picture quality HDMI is best, S-Video is least (but don't get me wrong - still looks good!)
What kind of computer network do you have in your house? Wireless? Wired?
If you can tell me which way you want and just how techie you want to get, I can draw you a quick picture and post it up for you.
Sorry for being long winded but in a former life I used to do this for a living....