Hi adlan,
I have just tested your kext - it makes my BCM5787M work. Moreover in "System Profiler" I can see correct information about the card (while using 10.6.3 modified BCM5701 plugin i got pci14e4,1693 instead of real name despite of DSDT patches I added).

But there's one problem - after loading the kext my system slowed down a lot. I barely managed to type sudo kextunload BCM5722D.kext in terminal. I didn't got such effects after loading hexedited plugin.
About 5 minutes later I used kextload command and got slow down again - but the negative effect was much lighter, I'd say about one tenth of first one.
Maybe it might have something to do with code optimizations? I really dunno.

I keep my fingers crossed for this project - who knows, how long 10.6.3 kext is going to work? It may get broken in Lion or even next update.

Regards,
Astarael

PS Sorry for my English, still learning