you can load 128 at a time onto the Helix, audition those "on the fly" within any patch. if you find one you like you can save it to your current patch (and any other patch later) and that reduces your available slots for different IRs to 127. rinse and repeat. it's not quick. hopefully the software editor will provide a method to run through all the IRs within your current patch, via your hard drive, edit/tweak, then move the IR onto the Helix. a good example of such software (plugin) is the Torpedo Wall of Sound III.