To enable this, you can download these two files and put them in your Chicago folder (DESK.CPL goes into the SYSTEM folder). The two dialogs inside CABINET.EXE appear as additional tabs in the Usability Test Options dialog, while the Appearance dialog replaces the Screensaver tab on the Desktop control panel applet.
The two window options dialogs are already gone by build 73f, suggesting they were either already on their way out in 58s, or the more likely scenario, they got ditched afterwards since window tiles were being phased out by then. The appearance tab persisted into 73f and g, but is still hidden there. The first build to reveal it appears to be 81, which got rid of the Colors control panel applet that previously served the same purpose.
