What about this fix I tried several months ago for the RT Spa 66? (and reposted just above )
Works here with CSP 0.3.0.p212
[SHADER_REPLACEMENT_...]
ACTIVE=1
DESCRIPTION= fixing mirror effect raidillon
MESHES=vis_1ROAD_1_001
MATERIALS= ROAD_TRACKMAIN01_WET
SHADER = ksPerPixelMultiMap_NMDetail
PROP_... = ksAmbient, 0.38
PROP_... = ksDiffuse, 0.33
PROP_...= fresnelC, 0.3
PROP_... = fresnelEXP, 6
PROP_... = fresnelMax,0.6
PROP_... = ksSpecular, 0.1
PROP_... = ksSpecularEXP, 10
RESOURCE_3= txDetail
RESOURCE_FILE_3= tarmac-detail.dds
RESOURCE_4= txNormalDetail
RESOURCE_FILE_4= tarmac-detail_NM.dds
(Yeah , just trying here to make you release a v2

)