Actual freezer :



img228.imageshack.us/img228/375/freezer01.jpg

I was thinking of this design:

img228.imageshack.us/img228/8577/freezer02.jpg

I think one big problem is the ventilation. I would like to know your suggestions. Can I use the same condenser unit? and what kind of evaporators of one fan each one? because it is only 43 inches widht and what about the expansion valves. It is for ice cream and it should be around -20 F.
The condesnser unit and the box are both outside. Help me please