Hi Roy,
Glad to see you're as friendly as ever! 
I assume both tracks reference the same software component? If so I'm not sure there is any easy way to implement with CM, as you say there is only a build space per software component.
With CM you can manage the changes at a more granular level, i.e. you can transport activities (SDA) rather than the complete SC (SCA) as you had to previously, so perhaps you need to change the approach to deploying/managing the changes?
Cheers,
Jason