Hello MarcuzXD,
Windows XP does have built in settings that will allow you to configure the wireless connection without the utility. If you haven't already, please use the Wireless utility in Windows. If your network adapter is installed, you should be able to do the following steps:
1) Open the Network Connections folder
2) Right-click the Wireless Network Connection icon, then choose Properties.
3) Click the Wireless Setup tab, make sure "Use Windows to configure the wireless network" box is checked. Then you should be able to add your settings from there.
If this doesn't work you may want to refer to the manufacter's website.
http://www.zonetusa.com/