Allright, this is the problem
I've been doing some dds edits for SO, and came actoss a very sad fact (see screenie) The whole barrier uses the same texture. Some parts of barrier have red white and blue layered over it, to make it well... red, white, and blue... The texture (armco2.dds) is merely grey barrier. Anybody has a solution? I'd like the barriers all around the track to be grey

by barriers I mean walls around the track

Don't know but it is probably same as blackwood's barriers - they are red and white but they use one white texture.

It's polygonal colouring, you can't change it in any easy way, really.