Ok I've figured a little more about this, it is NOT straightforward...
1. RSlinx gateway license has to be loaded on the workstation hosting the RSLinx Gateway server
2. RSLinx Gateway has to be enabled, it is disabled by default, use this guide to enable
https://rockwellautomation.custhelp....w/a_id/0020487
3. Then follow this guide
https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/62965
4. Disable firewalls on both remote and local workstation
Result: I did all that above and was able to see the emulated PLC on workstation 1 from workstation 2
Now another issue: FactoryTalk View Studio ME does not see the new drivers in Communication setup...
Man...Rockwell sure makes you work!