Selecting trialtypes from a larger set without replacement

[Marc Berman]

Hi,
 
   I'm currently coding a study where I have a large set of trials that 
I want to present (144 many of which are unique), but only want to have 
blocks of 36 trials with rest breaks in between.  I'm wondering if I 
nest the blocklist, into my totaltrial list, if I will be able to sample 
from the 144 trials, 4 times, and get all of the 144 trials without 
replacement.  If this will not work, is there some other way to do it?  
Thanks so much and hopefully, this is clear.

Thanks in advance,
-Marc