Hello,
When i open the instruments window (usually when starting a score), i've noticed there is not a VDL tab... is there supposed to be one (That is what i've been told), and if so, how do i make it appear?
Thank you!

Have you purchased and set up the Sibelius 6 template for VDL?

https://www.tapspace.com/VDL-Template-for-Sibelius-6-pr-95.html

As long as you've got that, it sounds like you're wanting to [url=https://www.tapspace.com/forums/index.php?topic=3169.msg16735#msg16735]set up a manuscript[/url].  Take a look at that link and do as Hugh suggests.  After that, you'll be god to go!