EXS 24 Logic Sampler Users Group

Is there any way to modulate the loop start time and loop length in  
the EXS-24? I've been looking for this in a sampler ever since using  
a Fairlight CMI, on that you could modulate these from the mod wheels  
and the LFOs. If anyone knows of a soft sampler (e.g. Kontakt) that  
can do this I'd be grateful to hear of it. Thanks,

G