There is a "Panel upgrade" utility available from Mackoy's website, which will create the panel2.cfg and other files that you will need.
Unfortunately, this doesn't automatically allow BVE 2 trains to display the BVE 4 timetables. You can do this by opening another train panel2.cfg file, and copying the relevant timetable section to the train you wish to use. By tweaking this bit of code, you can adjust the size and position of the timetable display.
There are some instructions on how to do some of this on my website.