Probably on the 770 side... there's a script in the Samba thread that I've begun playing with. You can use Gnuite's load/run command applet (on Maemo.org) to store the commands to mount it.

Find the code in the Samba thread and modify it to your settings.
Save it somewhere on your 770.
As root, run 'chmod 755 scriptname' to set it as executable
To test it, 'sh scriptname'. If it mounts you're good to go.
In Gnuite's Load/Run Command app, enter 'sh /path/scriptname' as the command and it'll store it.

The only thing I don't like about that app is that you can't (easily? (never poked around)) remove erroneous commands once you put them in. I just uninstalled.