Hi, I'm hoping someone can help me with the following. I have been asked to do a 4 tier cake frosted in Ganache. Is this possible? Is it stackable and how do you prevent it from sliding, or better yet sticking, when removing the tiers? I appreacaite any assistance. Thank you in advance. 
Yes you can stack a cake covered with ganache. sine you don't want it stuck together, i would use the hidden pillar method just cut the pillars so that they are slightly higher then the cake (no more then a 1/4in) and use a plate with feet to set the next cake on top.
Everything you ever wanted to know about ganache:
(Master and other recipes including white chocolate, as well as glazing, smoothing and stacking info and more.)
http://forum.cakecentral.com/cake-decorating-ftopict-497433.html
Chocolate 101:
http://tinyurl.com/ytby97
HTH
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