the current tarball referred to by the PPM-Sisyphusion-Gtk2_dll ppd has s1sgtk-win32-2-.0-0.dll in arch\auto\Gtk2 and the other DLLs under \script

I forgot about that.
In my script that assembles the PPM-Sisyphusion-Gtk2_dll package there's a comment:

# s1sgtk-win32-2.0-0.dll needs to be in blib/arch/auto/Gtk2 so that th
+emes are found.
[download]

There might be other exceptions to the general rule, too.

Cheers,
Rob