I also like this music from this FBR intro, but I can't find the SID tune because I didn't know who is the music composer and thanx to you CONRAD that you mentioned Jens-Christian Huus as composer for this tune. Your information is correct and I finnaly find this SID tune. The tune is: Jens-Christian Huus - Can't Stop.
Due to only having a PAL machine I never saw the true of the intro until now. I remember I kept loading up FBR's crack of Overlander just to watch this intro and listen to the fab music by JCH!
Man, the music on this one was the bomb back in the 80s... a true classic.