wireless N router to wireless G access point

I'm running a Linksys E3000 wireless N router but still have a few dead spots in my house as far as wifi signal on smartphones go..
today,I picked up a Linksys WAP54G Wireless-G access point at a yard sale cheap.
will these 2 work together and if so,will the access point fill those dead spots?or is it just to hard-wire something into it?

Depends what you want to do.

You can hard wire the WAP54G into one of the E3000's LAN ports and have a simple two access point setup.

Or you could do a form of WDS repeating where the WAP54G is peered to the E3000, but the original Linksys WAP54G firmware won't support that. You could try some third party FW, but that's a crap shot between different third-party providers, their particular release version, and the version of hardware.