>Isn't there some sort of scripting filesystemobject technique to id a drive letter for an application on the users pc?

Would this work for you?

oNet = CREATEOBJECT("wscript.network")
oDrives = oNet.EnumNetworkDrives()
FOR i=0 TO oDrives.Count-1 STEP 2
	? oDrives.Item[i], oDrives.Item[i+1]
ENDFOR