OK, just to clarify what I am searching for:
I have exactly one hardware synth, a DSI evolved which I rarely use anymore because, well , VSTis are much more comfortable in regards of recall, editing etc. Still, I like the evolver very much, and I'd like to have something to control it from my machine ( preset management, maybe some editing), ideally as a Vst plugin.
I once created a simple librarian for it using (argh) VBscript and MIDI -OX as an HTA, which of course broke when I switched to Win7. I also started to create an app in C#/.NET, but it is kind of tedious when you're not fluent in it. I have a decent knowledge of perl which is of no help in this case
I tried some of the libriarians out there (jsynthlib...), but they were mostly either incomplete, too simple, too complex, too old, out of development or needed a programming language I am not willing to learn (e.g. JAVA)
So I was thinking of the likes of Synthedit et al. Does anyone know if it is possible to do bidirectional sysex programming with the required logic to control a HW synth?

And yes, I know that there are apps/plugins from sound tower that promise to do such things, but they suck^H^H^H^H do not full fill my needs.
Also, it would be cooler to do it myself...

So that should be easy, right...

Thanks
Fese

EDIT: I don't know if this is the right forum, but didn't k ow where else to post it.

most likely you can do it with SynthEdit
SynthEdit has a (C++) SDK and you can code your own modules with custom midi input/output processing

Well, that might be a reason to finally start learning C++...

Check out CTRLR:

http://ctrlr.org/

It's for creating custom control panels for hardware synths, which can operate standalone or as a plugin. It generally works quite well, I use it to control a Waldorf MWXT.

There is talk of a poly Evolver panel here:

http://ctrlr.org/forums/topic/polyevolver-editor/

Peace,
Andy.