The mp3 is just the sample as above in the link (mp3 plays on mac also).
These ones I've done are limited to that key, if you buy the full set from the guys you get all the keys but you would only use them for yourself, as these are just free samples.
Give it a go with the loops you have.
Here is the SEQ template for the banjo
Banjo-Rhythm-Country-Travelin-Ev115-SEQ.zip it has the Loops also. The names in the markers are just the shortened Loop filename. The RED bars are UT settings, just press F5 or Bar in the Chord window then click UserTracks Button and it will show where that bar is played.
4 bar Endings @ 41,45,49,53,57
Holds @ 61,65,69,73 (for when they fix them)
Shots same as Holds but C.. @ every bar or @ 2 beats
I have some other free Fiddle Loops with Key: G + D, C, A, E, F Tempo: 76 Total Loops: 172, if you or anyone else wants to make it up let me know and I will send it or else I will get around to doing it sometime.