yes the GS-4 is an excelent one. and as smash said most erhaps all the earlier steam locos will work in 06. i have the rare articulated 2-4-4-2 loco. found on DLS just cant remember what subject its under. if you want real good locos go to Loco section right after the search in the box you will see a larger search box. under region/country go to Pacific. put in time period 1950's for most results, under class go Steam Loco & Tender, put origional for best results and hit search! this i use constantly. try it with all different countrys i dont know what will show up but go ahead and try it! thats where i found most of my steam locos.