WiFi with Draytek 2200usb router

I have a Draytek 2200 usb router, connected via good old fashioned cable to
3 PCs in our study.

I would like my laptop to have wireless access to the router, is it really
as simple as plugging a Wireless Access Point into the fourth Ethernet port
on the router and installing a wireless network card in my laptop?

If so, will I be able to set up the WEP encryption, despite the fact hat the
wireless access point is not actually plugged into a PC?

Any help would be much appreciated.

Thanks,

Rich