Right now the only free software alternative to have a replacement to exchange, so very fraking cool.
From the Zentyal website: The preferred way to install Zentyal on a new machine from scratch is using our tailored CD installer. This CD contains Zentyal and all its dependencies. When trying to install via this method I hit the following road block right away: The disk image is too large and will not fit on the recordable disk. Therefore: It is pretty much worthless if you can not burn it to CD.