[Scuderia_Turini]

Hello Ninco2000

Lap Timer 2000 has fallen out of use since computers stopped having serial and parallel ports.
The <Help> menu has the wiring diagram for using Infra-Red Diodes connected to the Serial port (either 9-pin or 25-pin).
You will need to provide an overhead light source and again there is a wiring diagram using infra-red LEDs. Simple arangement is to use a desk lamp placed above the sensors.

You need to be able to solder to connect the components to the 9-pin or 25-pin connector.

There was some trouble with Lap Timer 2000 not working, I'm not sure if it started working again.

If your computer has a 25-pin Parallel Port then it would be wise to use that with the Race Coordinator software. Lots of people use that so there tends to be a lot of support  for it on the slot-car forums.