How to access wireless pc from a Mac - and both to internet

MS Remote Desktop, Access pc from Mac,

[kents]

From home, I need to access my web server at work through my new pc laptop. But, I want to use my G5 iMac's big screen. I'm aware of MS Remote Desktop which allows me to access my pc from my iMac. But, I'm not sure how to set everything up so that I can
- Use the same internet connection (yahoo/pacbell) for both the pc and the mac.
- Use my pc laptop from the patio about 15-20 feet from my mac and internet connection/box.

Do I need Airport? Use Bluetooth? Network the two computers? Can I use the same internet connection to call up the pc from my mac using MS Remote Desktop, and if so, how do I at the same time access keep my pc laptop? wireless? (Yes, I'm pretty ignorant about this.)

P.S. My employer only supports pc's, not macs, and they purchased the pc laptop for me. So, getting a new Mac and using Bootcamp was not an option. And Bootcamp doesn't work on my current G5 mac. I must connect to the web server with a pc because I have to map a drive from a pc to access the web server -- they've set it up so that we cannot access the server through a Mac without using Bootcamp and Windows.