The Trystell fantasy setting from Tab Creations is ideally suited for use with the Tab-System Classic rules. In fact, the Tab-System Classic rules were originally developed for use with the Trystell setting.
The following conversion assumes that the reader has access to the Trystell Campaign Setting Revised Edition for setting reference. It focuses mostly on mechanical aspects of running a Trystell game, leaving most setting descriptions to be covered in the Trystell Campaign Setting Revised itself. The following conversion also shows off some of the directions and concepts taken by the upcoming Trystell: Reborn setting from Tab Creations.