Routing problem (also posted on forum.openwrt.org)

Hi everybody

I have my wl500gp all set up but I decided to use a trendnet TEW 432BRP to connect to the internet.
The network setup that I want is

Cable modem => trendnet => wl500gp

I have a client connected to one of the LAN port on the trendnet router. Then to another lan port I connected the asus router (LAN port on the trendnet to WAN port of the WL-500GP).

What I want to accomplish is to be able to access the pc from the trendnet's network (10.10.10.0) from a client on the asus' network (192.168.1.0)
Can anyone point me to a guide please?
Thanks in advance!

PS
I created a diagram with Network Notepad... Here it is!
http://img297.imageshack.us/img297/5...iag1ic8.th.jpg

Any idea anyone?

Map a net work drive?

\\10.10.10.0\name-of-share$

and use username/password of the 10.10.10.0 machine.