For anyone interested in firing a home server up at any time … or for a lan etc… i was going to write up a guide to get you sorted with known troubleshooting etc.
Then i seen a great guide by the crew from clanmech so i will simply point you there .
http://www.clanmech.com/guides/cod4/index.html
The one thing i differ with on the guide is the mod section… as i prefer ace mod over awe mod. Purely because i preffered the layout and guides at wildcards … as the 2 mods are extremely similar overall. Other reason would be that… use ace mod and call the folder “ace1” … and your BestGN rank will be retained on your own server 
Any dramas … let me know and i will help you out