GFI Webmonitor

I recently installed a 30-day trial of the GFI Webmonitor program on a PC running Windows XP sp3. I installed the optional/built-in MSQLExpress to be used for the database on the same PC.
The problem I am having is where do I place this computer within my network layout?

We have a T1 modem–>switch–>firewall–>2 switches on LAN
|–>IP phone system

Do I place the GFI Webmonitor PC to a switch on my LAN or do I need to install a 2nd NIC card and use the following setup? cat5 cable from firewall LAN port to GFI then 2nd cat5 cable to switch on my LAN?

Thanks!
Jason