After testing the W200 and trying other inbuilt cards on Compaq/HP products that use the W200 without success I went down the route of accepting that whilst the W200 was a good idea it was underdeveloped ( cannot blame Compaq for this - things just move on!! ).
Even if the W200 can be made to work ( does not co-exist with N standard ) you only have the 11mbs standard.
I decided to utilise the W200 casing which is very neat but with upto N standard cards and the development works very well.
Kits are available on eBay UK but although the kit requires both Soldering skill and network configuration experience the mod is very straightforward