This is taken from AsusWRT-Merlin Wiki and modified to work with CIFS shares. You can read what Entware is all about here. This assumes:
a Your router is 192.168.1.1 and is connected to the internet
b Samba is running on 192.168.1.100 with a share …

It's another day to be jolly. The WRT350Nv1.0 donated by (edit: names removed as requested) arrived Friday in all its glory which will replace my bricked WRT54GL. It's a shame OpenWRT doesn't support it yet. Still good though as I've always wanted to try out DD-WRT and maybe Sveasoft …