You can manually change it in through the wireless icon in the task bar....just click the icon, then click manage connections, click wireless tab, highlight your wireless connection and click edit, from there you click on IP Address tab. Go to the method drop down box and click manual, after that, you just enter in the new IP address, netmask, default gateway, and the DNS address if you know them....and that should be all you need to do. If you have any further questions, just let someone know and we'll help....have a great night.
Dell Latitude D810/2.26Ghz Intel/2GB Crucial/250GB WD/nVidia Quadro FX 1400 256MB/Intel Pro Wireless 2200BG
Win7 Bus 32 bit/LMDE-Sid-MATE 32/64 Tracking Sid