A few comments... but first an apology:
If you tried to installed XWP-Lite, it failed to create any XWP objects. Sorry 'bout that! The problem lies in 'install\instl001.cmd'. The REXX function 'RemoveUnsupportedFeatures' is missing its 'return' statement. Add it, rerun the script, then restart the Desktop.
As to Object Desktop: I have "the good parts" of v1.5 installed but not its folder enhancements. As many times as I've installed XWP on top of it, I've never had any problems. I can only hope that Greggory's problem was a one-time occurrence.
Finally, Sunny Icons... Martin, here are some answers to the questions you emailed me.
My _guess_ is that Sunny Icons just doesn't recognize the files window (on the right) as a WPS folder window, so it doesn't try to draw the icons itself. Xview doesn't get involved in how things are displayed in that window, so it isn't interfering with Sunny Icons.
OTOH, I could see where Sunny Icons might interfere with Xview. The screen shot of its menu shows a lot of options that Xview handles itself _and_ handles in a way that S.I. is unlikely to understand. Even if they work, they probably wouldn't get saved.
I'm sure that Sunny Icons and Xview can be made compatible, but most of the work will have to be done by eCoSoft or whomever maintains it these days.