You can also just copy and paste the first 16 mixer channel objects in the environment, then you'll have 32, 48, etc. You can do it 7 times to have a total of 127 mixer channel objects...and each one will be using the same underlying Inst object, probably Inst1, but have its own channel and port assignment.
However it will not work properly beyond 8 ports. And channel 16 of port 8 will not work either. So up to port8, channel15 is the max you can go before you have to use a new VEP instance, as of now, due to limitations in LogicPro.
The templates provided by VSL basically already have all of these created for you, so there is not much point in not using them.
Except for some reason, none of hte above is working for me in LPX 10.4.5, on neither of my macs. its a complete mystery to me why it doesn't work for me and does work for you. Until that is resolved, I'm on 10.4.4 where it works fine.