I have Site to Site VPN set up, I can ping and access files across the VPN tunnel.
However the issue is that, it doesn't display the computers on the workgroup on my network neighbourhood( ie remote computers can not see the main office computers)
Is there a way I will be able to see these computers? if so what command can I use to allow me see these computers.
You will have to enable wins on both sides of the tunnel. If you have wins servers on both sites, then set them as replication partners. If you only have a wins server in the main office, then set remote clients to use that for wins.