Dongle

Need help with setup of a dongle. Got Main computer set with 2 net cards. Card 1 connected to Cable Modem, Card 2 goes to network switch X 5.
Am trying to maitain original network settings to my five other machines and at the same time want to introduce an addional machine via a bluetooth dongle in the main unit. Purpose being to get a quick wireless connection to my existing LAN.

Running XP Pro. The WLAN must be internet capable
X-Micro Dongle

Thanks in advance