Is it possible to do something like this in PHYSFS

PHYSFS_setWriteDir( "test/file.zip" );

and then write a file inside the zip file? I've tried it but it always returns false for me. I looked through the documentation and I can't find anywhere where it specifically says that this is even possible. So, is it?

Thanks.

Just found the answer... and the answer is no.

Looks like I'll have to handle compressing/archiving some other way.