SPP File Format
VBOX Touch Speed Profiler application is compatible with .spp files generated from Speed Profile Software. Once generated, a file can be viewed and edited by opening within the Notepad program on your PC.
Standard SPP Specification
Friendly SPP Specification
Further to the above, the VBOX Touch Speed Profiler app also supports a more human readable format:
MPH Specification
The .spp file can be manually edited to convert units to mph: