make remote lan access on file server SAMBA

Hello I'm new and don't config the samba in a VPN.
There is someone that can teach like making it?
My situation is this:

host:
192.168.10.1 router adsl
192.168.10.254 wan
192.168.0.15 firewall
192.168.0.x/50 Lan with DHCP
192.168.0.18 file server SAMBA Linux Suse 9

remote:
192.168.20.1 router adsl
192.168.20.2 wan
192.168.2.254 firewall
192.168.2.x/5 Lan

The VPN is made and is transparent a lot is true that I succeed to see
the PC with winXP and job.
How I make to make to see from the PC remote the server SAMBA?
What I must insert in the smb.conf?
Thanks everybody for the help me, hello.
....sorry for my english...