Can I use an external bluetooth adaptor instead of the internal one?

HI Folks,
I need some better range for some bluetooth to serial adaptors so I purchased a class 2 (or was it class 1? memory fading but the higher output one) USB bluetooth dongle which advertised as being Mac compatible. Unfortunately when I plug that into my mini (previous generation core 2 duo mini) I can't see that I can disable the internal device. It shows up on the USB bus but as far as I can tell the system is continuing to use the internal device.
Is there a way to tell it to use the external device? Can I crack the case and remove the internal module? I know the airport module is a separate card I can unplug but can I do the same to the bluetooth?
Thanks for any suggestions!
James

heh, so I should have just tried it again. Last time I did this was a couple of OS versions ago though I have no way to know if that is what did it. Upon plugging back in the class 1 external interface is now appears that my machine is properly using BOTH interfaces. IN the discover new devices screen it now sees itself as an option which it never did before, and shortly thereafter the previously out of range devices popped up as well. So in order to use an external bluetooth adaptor it doesn't appear you have to do anything other than plug it in. It did not do this the last time I tried though.
In any case, thanks!

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