Wireless LAN close but not cigar (long)

Thanks for all the help so far, trying to configure my Zoom Air USB wireless
client 11MB. The Zoom Air uses the Intersil chipset so I am assuming it is
prism2. I have not got it working but found out more information:

YAST:
Yast lists the device as:
Class Unclassified device
Device identifier 210498
Vendor Intersil Corp
Vendor identifier: 199082

Now I assume that somewhere the vendor ID and device ID are used to look up
which driver to use, is this correct.

/var/messages/log
Looking the file I have notices that the following occurs at boot time
Sep 10 20:13:24 linux kernel: hub.c: new USB device 00:07.2-2, assigned
address 3
Sep 10 20:13:24 linux kernel: usb.c: USB device 3 (vend/prod 0x9aa/0x3642)
is not claimed by any active driver.

This appears to be the wireless lan being detect but unknown. I also notice
after this that the messages appear:
Sep 10 20:13:36 linux kernel: init_module: prism2_usb.o: 0.1.16-pre9 Loaded
Sep 10 20:13:36 linux kernel: init_module: dev_info is: prism2_usb
Sep 10 20:13:36 linux kernel: usb.c: registered new driver prism2_usb
Sep 10 20:13:36 linux insmod: Using
/lib/modules/2.4.20-4GB-athlon/wlan-ng/p80211.o
Sep 10 20:13:36 linux insmod: Symbol version prefix ''
Sep 10 20:13:36 linux insmod: Using
/lib/modules/2.4.20-4GB-athlon/wlan-ng/prism2_usb.o

So it does appear to be loading the right driver.

Now to my naive linux brain it seems that all I need to do is tie these two
together. Is this where modules.usbmap comes in I notice it have the
following lines:
# usb module match_flags idVendor idProduct bcdDevice_lo
bcdDevice_hi bDeviceClass bDeviceSubClass bDeviceProtocol bInterfaceClass
bInterfaceSubClass bInterfaceProtocol driver_info
prism2_usb 0x0003 0x09aa 0x3642 0x0000 0x0000
0x00 0x00 0x00 0x00 0x00
0x00 0x0000ce00

So it does seem to know that this device requires a prism2_usb driver. So it
would seem to be down the config file. I have created a file in
/etc/sysconfig/network call ifcfg-wlan-usb but this does not seem to be
picked up by ifconfig or iwconfig. What does ifup do?

Many Thanks

Jon