EXS 24 Logic Sampler Users Group

Hi, I bought the "Big Box" and my EXS24 finally expired and I have the EXSP 
now. I had numerous Giga converted instruments that loaded in about 5-10 
sec. with EXS24 and now with EXSP it takes 3-4 min! I cannot allocate sample 
memory with OSX and when I try to play the GIGA samples, after they finally 
load, they pop horribly. Can the EXSP not handle large samples like the 
EXS24 could? I'm frustrated and confused and I feel like i got screwed! what 
am i doing wrong?