Controlling PCI Drivers

Chmarr asks: "I'm trying to get a GNU/Linux box (Red hat-5.2) running with two differing ethernet cards (rtl-8029 and rtl-8139). While the box works just great with one or the other of the cards (using the ne2k-pci and rtl-8139 drivers, respecively) I run into problems if I try and use both cards simultaneously. The rtl-8139 driver loads, finds the 8029 card, complains and gives up. I'd love to be able to control how the PCI driver problems for cards, but the old ISA method (io=0x6100 irq=5 on insmod) doesnt work for PCI: it complains that the symbols aren't available. Does anyone know how to force a PCI driver to look at a particular address?"