@Bigger Boot Try this http://pastebin.com/sCrYk29L I've taken it from my own SDK2013 MP /bin folder.

@Wazanator Just to clarify, Gmod seems to need to be in the base Steam folder.

If installed/moved to another folder other than steamapps/common/ or even a different partition. Hammer doesn't seem pick-up the Gmod specific props.

Just a notice.

For garrysmod content, it seems it needs to be on C:\ before being recognised. Is this a limitation of the Source engine or the SMT?