TiVo Networking Advice

[pbags]

Howdy,
I was hoping for some advice on a wireless network setup for my folks - here's my situation:
They have a G3 iMac in their study & a 1 port Netgear DM602 modem (currently connected to the iMac via ethernet).

As the TiVo will be set-up in the loungeroom, I was wondering what would be the best option/configuration to get it wirelessly connected? (without an airnet card)

I've looked at the Netgear MR814 - which I thought i could connect to the DM602 - connect the iMac to the MR814 and then connect another MR814 to the TiVo in the loungeroom? - but I'm unsure if the two routers can be linked in such a way?

Any help hugely appreciated!