I have never seen that particular photo before but I do have photos of GMC-CCKW's, Leylands (Aust), jeeps etc being used as rail cars. Most were fitted with railroad wheels and just placed on the rails.
Cheers
Cliff
__________________
Cheers
Cliff Hutchings
aka MrRoo S.I.R.
"and on the 8th day he made trucks so that man, made on the 7th day, had shelter when woman threw him out for the night"
MrRoo says "TRUCKS ROOLE"