[bumblebee]

Chagalj,
If you just want each file (page) of the song merged into a single song in MS, the process is very simple already:

Save the PDF (or image file) of each page (you can do this within iReal Pro* assuming this is its origin) to Google Drive, Downloads folder (or wherever);
Create a new song in MS;
Files: touch the file browser and navigate to where the files are;
Touch each one to select then OK to Import them all;
Sort for your page order;
Fields: name your song and OK to save.

Or are you meaning you want MS to automatically find all the pages of the song?

* MS requires PDF, jpg, png etc. image files —you cannot import .irb files directly