PC to ADSL notebook to PC wirelessly Just can't do!!!

I have adsl broadband connected to desktop. All works fine. I have notebook
networked via ethernet cable. All works fine. Can't get it to go wireless. I
did have access to files and printer wirelessle but after fiddling.....Can't
get internet sharing at all. Whenever I try to connect wirelessly,
unsuccessfully, I have to reconfihure my PC for broadband. Have no idea what
I am doing wrong, other than doing it too often and getting completely
confused. Do I have to set up an entirely new network connection and if so is
it pc-network connect wizard and notebook - wirless network connection wizard
or is it the same wizard that I run on both machines, if so which wizard is
it?
Both machines are XP 1's home t'other is pro.
I have adsl modem/router connected to PC with user name and IP address on
the underside of it. Broadband provider is Westnet iconnect. D-Link DWL-G510
wireless desktop adapter. D-Link DI-524 wireless router, still in box and
internal Broadcom 802.11g in notebook and a husband who is driving me madder
than these machines. Would really appreciate some help with this!!!!