Have you tried this template?
http://members.westnet.com.au/nightc...template01.jpg
Do a search on the DLS for CS_Yard and you will find it, CS_Yard Template_1 (KUID: 37522:9972). Lay your track along the template, then use the "straighten track" tool on the section in yellow sections like so, you will end up with this...
http://members.westnet.com.au/nightc...template02.jpg
I use this one all the time to create yards.