there are some great tutorials in here and on ModDB about importing your own sound effects to half life, but i couldn't see any of them cover this thing:
take for example the sound effect "Access granted". it is made out of 2 .wav files - "access.wav" adn "granted.wav", in game the play one after another (for my underdasting) and when browsing through sounds in hammer they're listed just as "Access granted".
What should I do if I want to replace a sound effect divided into a few files?