I think your best bet is going to be to draw the paint lines with actual lines and then map the road and then use only asphalt on asphalt areas and paint on on paint lines... I don't think that the program will warp the way you want...
although you might be able to use the TCE vertices selection and then pull the lines to the straight texture lines.
look to my thread here.
http://www.inivis.com/forum/showthre...6813#post26813