Mounting localised content?

First of all, I know that I can copy the sounds from Half Life 2 spanish.gfc
But, garry, I have a suggestion. Can you get GMOD to mount the localised stuff for HL2 and, well, all the Source games?
Because copyng it to the GMOD folder means more HDD used.
Also, it´s very annoying that, when I download Gmod, it has to download the english HL2 and Ep1 language.
Why?
Also, Gmod mounts spanish language for Episode 2 without issues. It´s the only game mounted in spanish. Strange…