It's included in Scottish Central aswell as North Berwick, Glasgow etc but only Edinburgh Waverley to Rosyth is scened (first station on the circle after branching off at Inverkeithing). It's available for free from http://www.uktrainsim.com or on £4.50 CD with activity and exclusive stock.
www.uktrainsim.com - you need an account to buy a CD. When logged in, use the CD Ordering button on the left menu!
As its the Scottish Central CD you are on about, you get a range of DMU's (158's, etc) in Scotrail livery, an exclusive Class 220 Voyager model by Making Tracks - as well as a GNER HST as well as a range of diesel loco's such as 37's.