Quake 3 Transparent Textures

[Zurzaza]

Hi everyone,
I need to import a quake 3 map into my project, also using q3 shaders.
I've imported the function stored in "q3factory.h\cpp" files (That are use in the example 21-Quake3explorer), all goes ok...except that some textures (for example leafs) has no transparent background.
Using leafs as example, I can see the leafs but they're on a black background.
How can i solve this?

Thank you.

[hendu]

Even if you get them to EMT_ALPHA_CHANNEL, the draw order might be wrong - remember Irr doesn't do any in-mesh sorting, so two transparent objects on top of each other might be drawn in the wrong order.