2.5mm to 3.5mm audio output!!

[josb0513]

Hello, I want to use my HTC Touch and hook it up to Car audio.
So, I have a jack that came with Touch, which is 2.5mm I believe.
Now I need to get 2.5mm to 3.5mm jack to hook it into car aug hole.

But, way I understand from previous links,
it will not work as a stereo?
people complained about it being only played on one side of a speaker.
Is this true? only will work as a mono?

Thanks