disable CCA in Prism2?

[apartens at student.umass.edu]

I need help.
Does anyone know how to disable CCA in Prism2 cards?

I work with two types of cards: Linksys WCF11 and DLink DCF-650W. But I am
willing to buy any other CF wifi card if only CCA can be turned off on it. (i'm
kind of desperate:)

I think I am right that they both use the ISL3873 chip by Intersil. One way that
I think should work is to use the:

iwpriv wlan0 writemif <2*CR>

command to set the Configuration Registers to turn off CCA. But I am not sure
which registers exactly.

I will be very happy if anyone has any ideas or pointers.
Thank you!
Antony