Here is a list of good programs to try out for your layout.

Details of the Scalextric RMS system Here

Scalextric Sport RMS Patch Ver 1.12
Patch for the Sport RMS System Download

Tracker 2000 Good track design program
Shareware Program send you tracks into me when
you are done and I will upload them to my site Download

Lap timer software created by Gregory Braun
Very good timer software I had used it for a while
Until I got my RMS system. Download

Details on creating an interface that works with the above system
Link goes to another timing program as well Here

Slot Car Inventory Software created by Gregory Braun
A very good way to keep track of what cars you have
Download