Not an easy task, but I do have a ticket open regarding PackageHub and showed support the issues I'm running into.

Whats happens is if you do not have PackageHub downloaded and attempt to preform a SP migration through SUMA the target (in my case SUSE 12 SP5) will actually be grayed out. If you hover your mouse over the grayed out target it states that PackageHub is not synced. Once you download PackageHub the target OS/sp becomes available.

Like I said I showed Support this yesterday and they couldn't explain it and thought it was not supposed to work this way as well. We'll see what they come up with.

As of right now there is a problem with the checksum of several packages in 2 Package Hub Repos that are being address. SUSE12 SP4 & 5