You can download copy of version 6.013b
here.
Look for file called
addonsused.lpr
Open in text editor (Notepad, etc), and add the line
include( "./radartrap.lpr");
Save and close. Line can be added on any blank line.
Download and unzip attached radartrap file, and save into same directory where you found the addonused.lpr file (in later version of lapper, the file is already there, but I couldn't find it online). Should be in the /includes directory.
If you open the radartrap file up, you will see a selection of tracks that already have some details input.
For instance
RegisterNodeAction( "BL1" , 86 , RadarTrap2,"" );
This tells lapper to show the speed when car reaches Node 86 at Blackwood (BL1).
If you want to add your own for Blackwood, you would drive to the point on the track you want the speed trap to be, type
!node, then add a line, such as
RegisterNodeAction( "BL1" , 125 , RadarTrap3,"" );
As there are already 2 nodes recorded, the 3rd becomes RadarTrap3. If you want more speed traps, increment the number (you should easily get a dozen).
If you want to use zones rather than nodes (for instance, on an AutoX are, where there are no nodes), you would drive to point you want speed trap to be, type
!zone, then add the following line
RegisterZoneAction( "BL1" , -43,328, 1 , RadarTrap3,"" );
So this would be a 1m circular zone (you could change to 2 or 3 meters if you wanted - just change number to suit) located at -43,328 (x,y coordinates) at BL1.
If you get an error while inputting !node or !zone about not being admin, then look for files called admin.txt and superusers.txt, open them and add your username before saving and closing.
If there's anything in lapper you don't want to use - you can easily customise and make it a lite version - see
HERE.
It's all customisable, so if you want to move things about or change colours, its very straightforward.
Good luck.