my steps:
1. create the vm with the XPEnoboot_DS3615xs_5.2-5592.2.vmdk and installed dsm 6
2 the vm doesn't reboot just turn it of and copy the original XPEnoboot_DS3615xs_5.2-5592.2.vmdk into the vm folder
3. the vm already started with dsm 6.
4.volume creation doesn't work at the moment
I'll try to install first dsm 5.2, create a volume and upgrade the vm