Poor resolution from mini-vga to s-video adapter

I recently bought a digital projector to watch movies on at home, and am using my 14"iBook as the video source. It works great when using a vga cable. However, i want to run the cables up through the ceiling and down through the wall to keep them out of sight. I had read that S-video was supposed to be a fairly high resolution method of transmitting the signal, and is also a lot slimmer than vga (and thus easier to snake through the walls.) So I bought a mini vga to s-video/ video adapter and when I hook it up to the projector, the image quality is very poor. Is there a setting that needs to be changed on my iBook to get it to display properly, or something else that I'm missing? I bought the adapter used on ebay, so I'm trying to troubleshoot the problem without buying another adapter only to find out that it still doesn't work. Also, I am running screen spanning doctor, but even if I change to mirror mode, it still looks bad.

Thanks for taking the time to reply, John. That was my suspicion. Guess I'll have to drill giant holes to be able to run the VGA cable. Unless of course I could figure out how to remove/re-attach the connector end. Anyone know if this is possible? Or, is it possible to find a 15' long mini vga? It seems that there ought to be someone out there who could make custom cables for unique situations and needs like mine. What I really need is a box that runs off my ibook that has multiple display outputs so that i don't have to pull cords every time I want to switch from my 22" widescreen to my projector.

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