1) Change the piece IDs in the description of the Interactive Diagram before you paste it into the Play-Test Applet.
2) Edit the GAME code generated by the Applet in order to change the IDs of the pieces you want changed. Piece labels occur in the function definitions and in the arrays behind the legdefs array with step descriptions, in the Pre-Game code.
Two possibilities:
1) Change the piece IDs in the description of the Interactive Diagram before you paste it into the Play-Test Applet.
2) Edit the GAME code generated by the Applet in order to change the IDs of the pieces you want changed. Piece labels occur in the function definitions and in the arrays behind the legdefs array with step descriptions, in the Pre-Game code.