[KaCaT]

Just install it to up one level of your "cstrike" folder (e.g. Steam\SteamApps\*EMAIL*\counter-strike)
after that, set your liblist.gam (which should be in your "cstrike" folder) to "Read-only" mode by right-click it -> choose Properties -> In General tab, tick the option "Read-only"

Good luck!