Anyone having problem with inserting CDs and so on, please copy JK_.CD file onto the "RESOURCE" subdirectory of install directory and replace the contents with an hex editor, write these bytes:
0x84 0x32 0x97 0x69
(Obviously you first have to copy all the cutscenes stuff from both CD1 and CD2)
To run under Vista or Seven (32 or 64 bit) launch JK.EXE with -windowgui parameter. The menus and cutscenes will run in a window, the action will run fullscreen. Furthermore extend view area to maximum to prevent flickering.
You can bet those hints will make you run this wonderful game.