Well, that sucks plain and simple. Astaro just eliminated anyone who wants to use ACC in VMware. Tried the install, get a grub error 18. Googled it, it is because of the location of the /boot partition.
Can't get around it unless you put the /boot as like the first partition, which ACC doesn't do. Or use smaller than an 8GB drive, which can't be done due to system requirements.
Oh well.. I can't dedicate a system to ACC, but I had lots of room in our ESX farm.
Astaro, you guys might want to resconsider how you have the partitions laid out in a future release.