I have here (borrowed from Alex) a Zonet zen1200 10/100 Fast Ethernet card (cardbus) that uses the 8139too driver. This driver is not found on the pcmciadd image. I suspect that adding the driver should get the installer working with this card. (bug 63156 describes some problems with this card and hotplug, but this shouldn't affect use in anaconda since the problem is confusion with the 8139cp driver, which, I think, there is no reason to have on the pcmcia driver.)
The pcmcia-cs config file needs to be updated to have information on the module, then the anaconda images will automagically pick it up
fixed in 7.3-HEAD