Don't think its possible. Only way you could get a previous version would be to install from disc or another source. If you can update it from an external source too you'll be fine but steam will always install/update to the latest.
If you right click > properties > updates
then you can turn off automatic updates, dunno how to get certain versions or such though.
The option to disable auto updating is very clearly displayed in each games properties...
Steam will still update the game when you run it. Auto Update is just to keep the games updated in the background.
One of the main ideas behind the Steam update process is to keep games up to date.
I think you would have to find non Steam versions.
My GTA doesn't seem to do this for some reason then, I went to a older patch so more mods would work by doing that.
Erm... yes? I know? His question was how you play a specific version and I said steam will only update from the current version to the most recent so you can't get the version you want unless you install it with that version initially or find external sources of patches.