Virtual CD / DVD - ROM drive works and behaves just like a physical CD/DVD drive, however it exists only virtually. Image files can be mounted onto a virtual drive from your hard-disk or from a network drive and used in the same manner as inserting them into a normal CD/DVD drive.

There are several virtual drive out there. Personally, I prefer DAEMON tools (I use that at home) which has lot of function. However, it is not free for business / corporation use. Another one is SlySoft Virtual CloneDrive (use in office) and is completely free.