Vista and sharing removable hard drive on the network

I have a laptop with limited storage on it, so I have an extra hard
drive where I put all my music and files. I can share it fine on the
network with Vista, but every time I unplug it and take my laptop to
work and come back, the share has disappeared and I have to manually
share again. Is there an option for Vista to remember I want to keep
that hard drive shared? I know there's probably a batch command that
can be used, but is there an easier way? If not, what would be the
command for batch file?

BTW, I am mostly putting my computer on sleep and rarely rebooting it.

And just to clarify, this is Vista Ultimate Edition and I never had
that problem in XP Pro