hey for the source games only the gcfs have being updated. so i can replace them with the one from the dvd. now for steam you are right many files have been updated. there is also the platform.gcf which is the steam platform. but i will also swap this and i want to find the new steam.msi of to open msi with orca.msi and replace the files that are in it with the one from the folder
i will try it and i will tell you.
and i was not talking about old valve games. i was talking about source games