I take it the only track there is a Guitar track. There is no piano, bass, or string track available from your file.
Most often there's just one instrument per UT, unless you have a set of them in a bundle. I suppose this one technically is a "set in a bundle", but each one is a separate tempo rather than separate instruments.
Most of these actually come in just one instrument and one tempo at that, it is just a matter of choice of the creator.
Glad you got it all to work in the end, enjoy!

p.s. Please note that Usertracks do not have any automatic "swap based on tempo" like the stock RT's do, so you must manually pick the best fit for each case as possible.
p.s.p.s. Oh, and Usertracks do not have any built-in Db (loudness) adjustments like the stock RT's, so mind the volume setting for any Usertrack you try. In shoirt: Best to turn the volume well down before first play and bring it up gradually during playback to suit taste.