OK but,
to specify this problem:
the problem is NOT to save the 10 'official' Loops of a song in the mediabase.
The Problem is to save this on Loop that can be specified at the tab in german called 'medien', in english it's maybe called 'media'. There can be specified: start, end, bpm...
if you saved an 'official' loop of a song in the mediabase you can also use the 'Loop' tab: you can specified the start, the end and named the loop (the name will be displayed in the loop memory button tooltip).
The advantage of this specific Loop is: the song can be played from the beginning and this specific loop will be played automatically when the player reach this loop.
You can load your song, click on the memory button (so go to the saved official loop) and then go back to the start of the song. Play the song and this specific loop will be played automatically when the player reach this loop.