What exactly did you want to do with them Nick ?
I used to use them all the time back in the old days before the PC's were fast enough for audio loops.
Generally I'd edit them and send them to an external drum machine..had an Alesis SR16 and Yamaha TG300, also a Roland Groovebox.....but you can use a plugin drum machine nowadays. I'd normally find a basic pattern I liked ...paste it for however many bars I wanted, then draw some fills and stuff in the piano roll editor, maybe change some of the bars like drop the snare for the chorus after the middle 8 etc...I used to change the velocities in different parts too. You can turn them into groove clips now just like you can the audio ones and roll them out across the song for speed.
Sonar has a useful Drum Map Manager that lets you send certain notes to different instruments...say you like the kick from Session Drummer 2 ( which comes free with Sonar ) and the Snare sound from EZ drummer , you can configure it so you can do it from the same loop, rather that having to split them across seperate tracks like I used to have to do.
Pretty straight forward really...hope that helps some !
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