VPN and File Sharing

I have established a gateway to gateway VPN tunnel between two remote office locations using a pair of Planet Networks DSL/Router devices. Each location has a static address. One office is using 192.168.0.0/24 and the other office is 192.168.1.0/24. I login to each router from either location and even ping the remote computers (most of the time) but I can’t browse for them in network neighborhood or map a drive. All I want to do is set up simple file sharing and printer sharing between the two locations. Is there a step I am missing somewhere like adding a route to Windows somehow? What could I have missed?

Thanks for your help!