This appears to be the answer to the something bad happened with 0 byte dump files I have been plagued with these since updating to a new 64 bit pc and it appears many others also have this fault. But no longer, I can run the most memory intense routes with very large trains and no crashes at all. Watching memory use in game it still appears to be under the 2gb cap but this has something to do with 'virtual' memory. Main thing is it works. Perhaps RS lads could research this a bit but in the mean time if you are running win 7 with lots of Something bad hangs this is your answer.
RSC had confirmed in an email from a member that a code was placed to support this feature.
You can download the patch here:
http://ntcore.com/4gb_patch.php
Again this patch is only meant for users of 64bit systems not users with 32bit systems. Also make sure when you are prompted during installation you only patch
"Railworksproc2.exe"
I hope hawk can pinned this as it is very important in solving problems especially for builders.
I WANT TESTIMONIES!!!!!!!!!!!!