We don't have a Visual Studio add-in (yet) but you can launch our command line utility, ZeusCmd.exe, from within Visual Studio by going to your Tools menu and choosing External Tools.
When I install MyGeneration I do so in C:\\MyGeneration, so take that into account when looking at the above sample. The trick is making your Initial Directory point to your MyGeneration directory (where the MyGeneration.EXE is) and then making your Arguments path relative from there.
The above sample launches the CSharp_SQL_dOOdads_BusinessEntity.vbgen template and doesn't suppress the UI, therefore the GUI for the template pops right up, pretty cool. Give it a try and see what you think, however, you should be 0958b as there was a bug in prior versions.