Scriptnode Envelope - Hardcoded Use

[CyberGen]

I put together a simple AHDSR envelope with ScriptNode. It has nothing special, just really long parameter values. So I have a few questions.

1st - Is it possible to us it as a hardcoded envelope?
I compiled it to dll but I don't see a Hardcoded Envelope tab under gain modulation. And when I try to add as a time variant modulation it immediately crashes HISE. What other option is there to use this as normal gain envelope?

2nd - How do I go about adding a DecayCurve parameter like the stock HISE AHDSR Envelope?
The ScriptNode node does not include this parameter.