Background ambience I need looped?

First of all, thanks for the help on a recent query.  I found a 10 second wav file of an ambient bed sound that I'd like the middle 6 seconds or so looped.  While I know i can just copy and paste the file and then use crossfades to essentially loop it, I suspect there must be some sort of sampling VST in Sonar that makes this simple.  I tried opening a simple lead sound in Rapture and then loading the wav file as the sample (overriding the triangle wav that the preset originally used), but it definitely changed the sound too much, and it didn't loop.  Can anyone give me some pointers on how I could most easily do this?  Running the 08/17 version of Splat.  Thanks in advance!

Select the clip-> open the inspector->select clip at the top of the inspector-> select groove clip-> check the box for looping-> Drag the right side of the clip for the desired length.
 
Rocky