Turn WiFi router into WiFi receiver?

i have a A T and T wireless router that's for dial up internet and i have cable internet. i have a Zoom cable modem hooked up to my main desktop and i have a Netgear wireless G router right next to the zoom that i use with my laptop. now i want to get my 2nd desktop hooked up to the internet and it doesn't... show more i have a A T and T wireless router that's for dial up internet and i have cable internet. i have a Zoom cable modem hooked up to my main desktop and i have a Netgear wireless G router right next to the zoom that i use with my laptop. now i want to get my 2nd desktop hooked up to the internet and it doesn't have a built in WiFi receiver WiFi and there's no cable by it so a wired connection is not a possible. can i use the A, T and T modem as a WiFi receiver to receive WiFi signals and then use Ethernet to the computer so instead of getting the internet from the wall i would be getting it wireless from the netgear wireless modem.
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