Placing multiple sound clips in a single file

Hello,

I strongly recall mention of people storing multiple small sound clips in 
a single ogg vorbis file and then referencing them within the file, rather 
than having multiple small files.  However, Google has failed to turn up 
anything posted about this.

My friend is thinking of using this technique to cut down on the space the 
sounds take up in his games client.  He is interested in information on 
techniques for generating such files and then referencing clips in them, 
and any code that might be available.

Thanks in advance for any help.

Cheers,
Geoff.