I would use 2 NICS on both machines and designate one from each as the Load Balanced devices.
Edit the properties of the NLB nic with an IP that both comps will use. This will be the Primary IP. Specify the subnet mask and a FQDN. The FQDN needs to be registered in DNS and pointing to the NLB IP address. If you choose not to use a second NIC in comp 2 you'll need to enable multicast for that unit.
On the Host tab set the priority, a unique number for both comps. You'll need to specify the NIC's static ip address and check whether you want the cluster enabled immediatly.
You'll need to configure your port rules and modify the TCP/IP settings of the NIC to include the newly NLB IP address.
Once complete drop to a command prompt and test the NLB. Run both wlbs query and wlbs display. The first should display the Priorty numbers you set on the Host tab and the second displays more details of your cluster.
Make sure to check DNS to see if the entries have been added.
Hewissa
MCSE, CCNA, CIW