[CentOS] Configuring Multiple Gateways

I'm in need of installing two NICs in a machine that are connected to 2
different public networks and I need both IP addresses accessible from the
outside.  The IPs are part of two completely different subnets.

For example:
eth0
     IP - 10.10.10.2/30
     GW - 10.10.10.1

eth1
     IP - 20.20.20.6/30
     GW - 20.20.20.5

How can I configure 2 gateways on this server?

Thanks!
-- 
Matthew Martz
CentOS Mirror Admin
mdmartz at gflug.net