Hi Mike,
The meters and menu on the right is a program called TinyMeter. The ASYS4: bar shows how much space is left on your system partition. To change the preferences you have to make a few changes. Goto the Prefs drawer and select show all from the workbench/windows menu. Now you can see the TinyMeter prefs program, but it needs a stacksize of 8192 to run. So start icon-edit and set the icon-type to tool. Save the icon in the prefs drawer as Tinymeter.info. Now goto the prefs drawer again, select the tinymeter icon and select icon-info from the workbench/icon menu. Change the stacksize to 8192 and save it. Now you can start tinymeter prefs by doubleclicking it. You can change the font-style by going to the compose list tab and doubleclicking on the clock items.
It looks like amigasys uses birdie to change the window borders, but I can't find nothing in startup-sequence, so I have to figure out where they can be changed. I'll keep you informed when I find out how to change them.