Install error with Ghost 14 on Vista 64

I am trying a clean install of Ghost 14 on a Vista 64 machine. The error comes up shortly after the launch saying it can not find drive M:\

 

My M drive is network attached storage and is a mapped drive to letter M on my system. Not sure why Ghost would  fail for this reason. On my older XP machine I could have mapped network drives and never had problems. Can someone suggest a fix? 

 

I may try to remove the mapped drive and install on the machine. Then after install (assuming it works) re attach the drives. Will this work?