If you need drive mapping, you need this! tssSubst is an ActiveX/COM component that will take any folder on your file system, and make it appear as a separate drive. For example, such as C:\MyWorkDocuments\2002\March\27\Expense\ can be replaced by G:\ or any letter. It can make getting to data more efficient for users, and make it easier for software to manage the file system. It works just like DOS Subst, but is designed for today's OS.