Yes, do this:
1) Install Steam on the computer, run it once, login to the account, and then close it down.
2) Copy the files from your other computer. The ones you need are: C:\Program Files\Steam\SteamApps\*.gcf
(All the *.gcf files hold the game content.)
3) Put them on the computer you just installed Steam on, in the same directory.
4) Run Steam again and the games will work.