Wow! Do you have a separate adsl modem on each pc? Can you run them both at once? I didn't think that was possible.
Yes, you can get an adsl modem wireless router which you connect to your phone line. The router establishes and maintains your broadband connection. You then connect your pcs to the router either by ethernet cable or wirelessly and they can operate totally independently of each other.
In terms of equipment you will need the router, an ethernet cable (usually included) and a wireless adapter for the laptop. Some laptops already have an adapter built in, so check before you buy. You can get either a PC Card or USB adapter for the laptop.
The router will come with instructions for setting up the system. I suggest that rather than trying to detail everything here, you follow the instructions and come back if you get into difficulty.