Hi Luke,
I believe you have already noticed that there are two kinds of upgrade method within HPDM:
- Service Package upgrade which we try to make as simple as possible in order not to bring much burden to HP customer.
- Major Release upgrade usually include some fundamental changes that have to be deal with carefully and seperatelly.
With that being said, in your case please upgrade to 4.7 first then apply the latest 4.7 service pack.
If you have differnet subnets in your environment then there will be no issue at all to have a new 4.7 server. Just make sure to apply different DHCP option in the different subnets. So that the "small group" of thin clients could register to new DM Gateway
We don't recommend customer to install two DM gateways in the same subnet, this will cause some unexpect issues for running tasks.
The last question: please keep in mind to update Agent before executing tasks on a newer DM server.