[Powerlord]

I've noticed when I try to build this extension on Windows using Visual Studio 2010 that I get this error:

Error 1 error C1083: Cannot open source file: '..\..\..\..\Source\hl2sdk-ob-valve\tier1\strtools.cpp': No such file or directory D:\tf2server\dev\sourcemod-1-4\public\nomvm\msvc10\c1xx nomvm

I've noticed this file is in the project under "Source Files", but removing it makes the compile work OK. Is this file actually used for something, or just a problem with the .vcxproj file?

(Also, no Makefile in the source rar?)