if you don't want to use energy up compressing it or finding a taiga biome for the snowmen (snowman poop 9000 systems only make snowballs in taiga now) than have a look at this BC sub-mod if you've got BC installed. Lots more expensive than a compressor setup but doesn't need EU. The down side is you'll need 50-60 of the glacial guys and half that in the water ones to supply the water.
Technically you could just use Singularity Compressors, Aqueous Accumulators, Glacial Precipitators to make Ice, you tell the GP's to make snow balls (More effecient than having it make straight ice), and send the snowballs to compressors, and you'll really only need like 2 sets of 3 GPs and AAs and you'll be golden. I use 4 singularity compressors and any overflow is sent into a void pipe.