I'm affraid that with your current version of Sice you won't succeed, because if I remember right, +ORC uses features (like memory snaps) that is only in Sice for DOS v2.6 (?); If you don't want to run in DOS, consider trying VMWARE, it is virtual machine, where you can install any OS. I have one with DOS and both old versions of SICE installed and it seems to be usable.
On the other hand, when talking about newer Sice versions (lets say from 3.2), the commands aren't changing very much so it isn't big issue when you have other version.
Regards,
least