Mike gave an instruction in this post. If you need additional information to create a symbol from subckt, you can scroll down that post and I have two slides for that.
With that, you can create a symbol (.qsym) which consist of the subckt, which means you symbol contains everything the simulator need.
You don’t have to add into Symbol & IP Browser, you can simply drag the .qsym file from windows explorer to schematic, and symbol will load into schematic.
This is a summary of Mike’s instruction.
