Thanks jazzmammal for your thoughts.
Free backing tracks?? ..... not really interested in going down that path and that's the reason I bought this software. For many years I have been an advocate of live music rather than "canned" music and while BiaB is nearly going against the grain, I get a lot of self satisfaction in creating a track which is completely different to the original song but when you put the guitar and voice over it, it's really great.
I must get into the midi side as it would probably give me more options but have very little idea where to start even though I have a midi keyboard but having an issue with the Edirol USB connection (15 years old) with windows 10.
Thanks for your comments.

BIAB 2022 UltraPAK
Xtra packs 1,2,3,4,5,6,13
2019 and 2018 49pak
Asus Zen Book UX533F 1TB ssd
Windows10 pro, 16g i7 64bit
Allen and Heath Z10fx mixer
Alesis V25 controller