Thank you James! That is exactly what I was looking for.
I programmed all 3 devices with the same serial number, and they all now show up as the same comm port!
Ain't the internet wonderful...
Reading through the utility program that FTDI makes available, I saw this:
It is also possible to fix the serial number to a fixed 8-digit alphanumeric string; however we do not recommend this as systems will only recognize the first instance of such a device connected to a PC.
I read that to mean that if you convert all your FTDI based arduino boards to have the same serial number, you will give up the chance to be able to have more then one attached to your PC at any given time. So a trade-off of sorts?