There's games I play which require a C: drive for play. (Stupid.. but still)

I don't have one. Windows was a moron and put my system hard drive as the E drive.

I already know the SUBST command and use it for this, but is there a way using Scheduled Tasks to make the command prompt come up, do the SUBST command how I need it and close?

Or would I need to get an 3rd-party program to run at startup?