[iBook] How do i set up a Wireless Connection using Airport Express with an USB modem.

[Sean]

Hello

I have an iBook G4.

I am using an USB ASDL Modem for my broadband connection.

I wish to connect to my Airport Express Base Station, so that I can  
go wireless.

I have been told that it is not possible to go wireless with this USB  
Modem, and that I need an Ethernet modem to make the connection.

Is this correct?

I would appreciate all help and advice.

Regards

Sean Finnegan