|"I just did a repair install of windows, but no help there"|
You can't fix a hardware problem by reinstalling software.
"Purchased a ECS Geforce6100pm-m2 (v3.0) board from tiger direct earlier this month"
The board you bought isn't a good one. It's based on an nForce4 chipset that was released over 5 yrs ago. Basically you bought an old board that was retrofitted for newer CPUs. You could have done much better.
"I have set the Bios to boot from the PCI-e slot, but still only boots from onboard vga"
You need to change the settings for "VGA Share Memory" & "Initial Display 1st". You should also update to the latest BIOS available. Once the BIOS has been updated, use the clear CMOS jumper to reset to BIOS defaults, then reboot, correct the BIOS settings, save & shutdown. Install the card making 100% sure it's fully seated in it's slot & locked down, then connect the monitor cable to the card. Reboot & see if you get a display.
"my psu is a Zumax 500w"
Specs are out of whack - way too much amperage on the +5v rail. At best, it's a 400W unit.