There is a new version of TsGui on the Download page. This version fixes the issue where the TsGui window doesn’t open center screen like it is supposed to in WinPE.
In the process of fixing that issue, I also developed a ‘Live Data’ window that is useful for testing. This displays all GuiOptions and NoUIOptions and their current values. It also displays some basic info like screen resolution and window location. You can enable this using the LiveData attribute for use in testing mode, or using the Debug attribute if you also want it to display during a running task sequence. See the Config_Examples.xml for details.