Steve, I'm not using the isapnp tools. I'm using the isapnp support in the kernel. I suspect there may still be some pnp mapping issues in the 2.4.x kernel. I have a U.S. Robotics 56k pci modem, which the 2.2.19 kernel recognizes just fine, but the 2.4.12 kernel is having problems with. So it's still not all cut and dried. Gene