Yeah Zuki, now I think I get you...You want to be able to load up the smf with, say, a performance, or indeed an STS..
To the best of my knowledge this cannot be done. The only place a midi file can be automatically recalled from is a Songbook entry.
But I will have a bit of a fiddle and see what I can figure out.. Alhtough I don't hold much hope as I was trying some different options whilst I was writing this post.
Dennis