And on top of that it really shouldn't be posted in the Development forum, which is only for questions regarding the source code.
Have you ever thought about making modplug tracker a full vst and vsti synth.
It would be so good.
There has been an experimental fork of OpenMPT a long time ago which turned the whole application into a VST, but it was very hacky and it certainly didn't have the quality a feature should have before we'd consider it for inclusion for the general public.
If on the other hand you are just interested in the sampler part, there are many other sampler VSTs out there which probably do a much better job than OpenMPT (maybe give Redux a try). They certainly also will not "click" as that is a very basic sampler feature. OpenMPT's engine is mostly written with efficiency in mind for mid-90s processors, so many dedicated samplers will offer better sound with less tradeoffs. OpenMPT's engine is designed for playing tracker music, not for being a general-purpose sampler to be integrated into other software.
The rest of your post I didn't really understand because it's just an ongoing swirl of words but from what I think I understood, you just need to find the approriate plugins to create the effect you are after. If that is not what you wanted, please try rewriting your sentences with proper punctuation because right now they don't make any sense.