Demo scores - one score after another in MuseScore

In Czech Forum was posted the question concerning the score/instruments insertion features in MuseScore: the placement of scores - one after another - obviously with different keys, in one score/project document.

The MuseScore user wants to make something like a score with demos. The time of Christmas probably raised that need.

The structure described by user:

Title 1
(Subtitle 1)
follows 10 measures of score - carol

Insertion of another score (maybe another instrument/or more probably the of same instrument)

Title 2
(Subtitle 2)
follows 10 measures of score - carol

Title 3
(Subtitle 3)
follows 10 measures of score - carol

I suggested the solution in usage of plugin Break every X measures, and insertion of vertical frames - for Text -> Title insertion - and move down to the right position, the turning off numbers of measures, deleting names of instruments, ... and manual drawing of key signatures :-D (now I can't remember if it is somehow possible to divide the score and continue with changed/other key signature (or I should read the Manual once again...)

So here is my solution (if there is no need to change the key signature, measure numbering OFF, instrument names OFF):
Create -> Measures
Break every X measures (Break every 10 measures)
-> Insert Vertical Frame

...and the result isn´t exactly perfect. :-)

Tor quite a short time it seemed to me, that it is very easy task, and that the insertion of new instrument resolves it - but then when tested again, the newly inserted instrument joind the first (as second staff) in one grand system, and this finally wasn´t the solution, which was demanded.

Other options?