Anderton
Many of the Big Fish Audio loops are arranged in "construction kits," which means they all play well together to create complete compositions if that's how you want to use them. SONAR's Browser is particularly useful in this context because it's a "multitrack" loop browser - while a loop is playing, you can ctrl+click to select/de-select other loops to hear how well they work together.
The only constraint is all the loops have to be in the same folder; as soon as you use the Media drop-down menu to select another folder, playback stops.
It's also worth noting that the media browser has a built in volume control/limiting, so that when you add each additional loop using ctrl+click the overall volume remains the same (saves speakers, headphones, eardrums etc).