Advice Newbie

Hi
I'm currently looking to upgrade my internet connection from ISDN to ADSL.
At the minute I'ved got a laptop hardwired into a linksys wireless-g access
point.
The other PC in the house has a PCI wireless card and is configured to
access files and the internet through the laptop.

Can I purchase the Linksys BEFSR41 4 Port Broadband Router and hook the ASDL
modem into the router and then wire the wireless-g access point into the
router ?

Do I need a PCMCIA wireless card for the laptop? (There is only one
connection at the back of the wireless-g access point,which will be taken up
with the router)

What have I to do to allow the PC to access the internet without going
through the laptop after I get broadband?

TIA

George