setting up two segments on LAN

At our company we are going to have 2 leased line internet access. i.e one 256Kbps & 512Kbps we are using 2 routers for this purpose. we’ll be using 256Kbps line to first segment of LAN & 512Kbps line to another segment of LAN. these two segments will have different subnet first one will have 192.168.1.0 255.255.255.0 & second will have 192.168.2.0 255.255.255.0 . these two segments should communicate with each other.

how do i perform this & do you see any possible pitfalls in this setup??