The default location is C:\Documents and settings\"your account name"\Shared. Do you have a G drive? Go to Start>My computer, and see if it is listed as one of the drives. If it's an external hdd drive, make sure it's turned on or you won't be able to access it.

If it's on, you should be able to browse to files with Nero. Go to Nero Vision > Make DVD > Add Video Files, and browse to the file location. Once found, hi-lite the file and click open, and the file is added to the project. The process is pretty straight forward.

__________________
If it ain't broke, fix it till it is!