GTX 460 forcing deinterlacing

[Xorp]

I got a new Geforce GTX 460 video card that seems to force deinterlacing on everything. Problem is that it does a really shitty job. Everything is really choppy/stuttery, it looks like it's blending frames, and framestepping back every other frame at the same time. It also doesn't perform IVTC on 1080i material, so film 1080i60 is deinterlaced to 30fps, not proper 24fps. As you may or may not know, the video controls in the Nvidia control panel are really sparse. The only options are denoising, sharpening, and inverse telecine. No deinterlacing options at all. The problem occurs with inverse telecine on and off. Also there are no deinterlacing options in MPC-HC's AVC decoder either. This problem also carry over into TotalMedia Theater and it persists in both Windows XP and Windows 7.

Is there like some advanced Nvidia Purevideo configuration/tweaking program where I can change when it should try to deinterlace/process video?

Thanks for any help