Wireless router pluged into a wired router ?

[RealMentalCase]

I have 3 computers hooked to my 4 port router and i want to
hook up another pc in the garage but i can't be drilling any holes
though the walls !

Can i plug a wireless router into the open port on my router so
i can get hooked to the internet or is there something
else i can use that will get me hooked up

if so what do i need ?

I want it to be as fast as the setup i have now

 

[PTNL]

just turn off DHCP in the wireless router, and use a normal ethernet cable to connect the wifi router's 1-4 ports (not the wan or internet port) to one of the 1-4 ports on the wired router. you may need to power cycle your broadband modem and the wired router as well, but that's not a big deal.