[Wine] Map a network CD Drive

[roygbiv]

I am trying to map a network (windows shared) DVD drive via WINE. 
Using Ubuntu Remix 9.04, I have mounted the drive and am able to access it via Ubuntu. However cannot map a drive letter via the Wincfg interface. 

The various suggestions in a various forums have suggested mapping to the /mnt/sub-folder however there does not seem to be a sub-folder in the /mnt directory. Is there something I am missing?

Much appreciated