Are you installing DL 3.5?
Generally speaking, your wireless should work OOTB; sometimes a little work needs to be done, but not always.
To check and see whether your wireless is recognized, simply open WICD. WICD can be found in the upper right hand corner in the "system tray."
If there are no wireless connections configured in there then you may have to do a little configuring.
I noticed that your post says something about Broadcom...Please
check this post out and see if it is of any help.
Thanks,
Ch@d