here's how to convert TS shp to Ra2 pallete easily
1) open the TS shp in XCC mixer.
2) press ctlr+p to choice pallete, choose Ra2 corresponding pallete (like for TS shp having unittem.pal u have to choose Ra2 unittem.pal)
3) Now right click on the file and choose Copy as PCX.
4) Here u get TS shp converted to PCX files having corresponding Ra2 pallete.
Only problem is that the background is often the wrong color and so does not become transparant ingame and you end up with your SHP's surrounded by boxes