@Cloudschatze where did you get the Game-Icons for Geoworks from and what Version are you using ?
Even if I do not put a VGA in my T1000 I still have an Amiga Bridgeboard with 286/8 an VGA in it :)
I'm running GeoWorks Pro (1.2.8) on the RL. I did try GeoWorks Ensemble 2.0, but found the performance lacking compared to the earlier version. I imagine 2.0 would run well enough on your Amiga setup though.
The Sierra icons were pulled from the respective collection/anthology discs. The process for importing and using icons within GeoWorks is cumbersome, but I can share the originals, as well as the "converted" GeoWorks versions, if ever you're interested.
Here's the current desktop:
GeoWorks' "DOS Programs" launcher has a number of built-in icons that make it a fairly pleasant front-end, if you're interested in that sort of functionality (GeoWorks can start-up in this mode, if desired). The biggest limitation with this is the unbelievable inability to sort or re-arrange the buttons.