How do I find out the device node corresponding to my device in SuSE 8?

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http://unix.stackexchange.com – I'm forced to work with a bunch of point-of-sale systems running SuSE 8. They are my client's computers. We are stuck dealing with these old systems until they get to upgrade their whole fleet to SLE 11. The problem: the system now has two devices that compete for the ttyUSB* character device nodes. They have different vendor ID and product ID. SuSE 8 doesn't have udev, it has devfs instead. Knowing the device's vendor ID and product ID, and the kernel module responsible for the device (it's the ipaq kernel module), how do I find out what character device node it has been assigned to, in a w (HowTos)