AMAZING! I got this damn thing to work under Slackware64 ... somehow. I'm not exactly sure of the steps at this point. It's not too shabby!
A major problem involved compiling the necessary 32 bit libraries for a 32 bit version of jack audio. Another major problem involved finding the latest source for dssi-vst and ensuring that the . /etc/profile.d/32dev.sh is run from a fresh terminal for compiling and running 32 bit programs. I'm posting another picture of my desktop in the Slackware forums with Rosegarden running a Windows VST, DSK_Acoustic_Guitars, as a test.
I've certainly got to streamline this process ...
Link to latest source code:
http://breakfastquay.com/dssi-vst/