As for looping Map Room from IJ (great song choice by the way. Full of mystery and drama!)
-You can create your own element by hitting the + icon next to elements in the master interface.
-click properties on the right and click the drop down menu for Elements
-click Import Samples and then upload your mp3 of The Map Room
-the last time I did this it made me select a License option, I just clicked sample name. I assume this is for streamed online games or something. But it doesn’t matter in private games.
-give the Element a name, set the type to Music, and make sure to set the sample playlist to repeat when playlist is exhausted
-if you want you can select to crossfade
I do this with a lot of my games cause I’m picky about my music choices. Hope that helps!