allowing bidirectional travel between ethernet cards

I have a lan with two addresses 192.168.0.0/24 and 192.168.1.0/24. The first is served by a Slackware server with two NICs, the second is served by a FIOS router. I have kept the two networks fairly separate, the 1.0/24 network handles all windows based machines and a Buffalo Linkstation NAS for storage. The 0.0/24 handles all Linux dabed programming, and backs up to the NAS on a nightly basis using rsync. The NAS is attached to various Linux machines using NFS (CCFS). Recently I decided to try add nightly Windows backups to the NAS, and ran into a problem. The Buffalo NAS does not support either rsync or ssh. The machines linked to it are on the 192.168.0.0/24 so I can't currently rsync to them. I was planning on using either Cygwin or Acrosync on the Windows machines to provide rsync and ssh but so far can't resolve the issue of allowing communication from the Verizon router side, 192.168.1.0/24 to the 192.168.0.0/24 side. Traditionally I would modify the resolv.conf file to handle multiple nameservers and gateways but don't see how to do that with the Verizon router. Perhaps someone can point me in the right direction. Thank you,