Volvo FM 13 8x4 Trailer Road Train

Can u plz give me all the instructions of installing this mod using the IMG tool plz coz I tried but I can't find the truck anywhere on gta

1.open gta3.img with IMGTool
2.edit>find>type rdtrain.dff and rdtrain.txd and then ok
3.replace rdtrain.dff and txd with right click then replace it with te new ones
4.select command>rebuild archive
5.wait until it done to rebuild

done...and play the game

maybe you'll need this for instant spawn roadtrain

http://zazmahall.de/ZAZGTASANATORIUM/zazmoddat00100/VehicleSpawnerPremium.htm