by Bob » Sat Dec 23, 2006 12:56 am
First and foremost you cant do it smoothly.
There is a file in the sourcesdk directory called game info or something like that that has all of the modding information saved in it. open it up, and read.
in regards to updating your source code i would suggest you jump on google and hit up an application called winmerge. drop the new source code into one directory, and then merge your codebase into it. problem solved.