I'm using a NVidia GeForce 6200 and I had my HTPC built by
http://www.cellarcinemas.com/cgi-bin/store/index.html so I can't answer your application questions concerning ISF-calibrations or Theater Tec DVD 2. Descriptions that might help from CellarCinema's website:
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"We professionally calibrate all of the video paths through the HTPC so you can be assured of videophile-grade performance. Normal PC video levels are NOT the same as video levels used in high-end video components that follow SMPTE, EIA, and HDMI standards. This is a huge distinction between an HTPC and a regular PC.
We perform HTPC video calibrations using an oscilloscope, reference test pattern generators, and other equipment we use as ISF-certified video calibrators. Our experience has shown that the calibration differs dramatically from HTPC to HTPC based on hardware, drivers, software differences, display connection type (e.g., DVI-D vs. YPrPb), and other variables. We calibrate each HTPC system individually to match your particular display device and connection method based on solid video engineering standards.
We calibrate MPEG decoding via VMR9, TheaterTek, MCE DVD Playback, TV/PVR and other video paths so that the video output from the HTPC-MCE is consistent and correct. We also set black and white levels to Studio RGB levels (digital 16 and 235 respectively). Our calibration also checks for proper color decoding (601/709), gamma, saturation, and hue.
We also include HDTV test patterns pre-loaded on your HTPC hard drive! Under a license granted byJoe Kane Productions to Cellar Cinemas and our HTPC customers, we are now including basic display setup test patterns from Digital Video Essentials Professional in 720p and 1080p VC-1 (WM9-HD) HDTV format. These patterns make it easy to quickly set your display's brightness/black level, contrast/white level, and picture positioning/overscan settings. Once your display has enough hours on it, then you will be ready for a full ISF display calibration from a trained professional with the appropriate calibration equipment."
"TheaterTek features state-of-the-art MPEG decoders from nVIDIA is a DVD player designed specifically for custom HTPCs. Dolby Digital and DTS audio supported via S/PDIF (no decoders unless you order the HTPC with analog audio). Unique features include PCFriendly suppression, movie bookmarking feature to allow jumping directly to the start of the movie skipping previews/ads/menus/warnings, automatic blanking, custom and automatic aspect ratio control, and automatic video card optimization. We highly customize this player with ffdshow-based video post-processing."
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Using TheaterTec, I'm able to configure any video format to fit my screen. Because my first love in audio is multichannel, I don't follow the same route of most 2 channel audiophiles. I use a VH Audio Pulsar cryoed digital cable w/ NextGen silver connecters plus a cryoed TweakGeek Bybee slipstream adapter w/NextGen silver connecters, that runs from my M-Audio Revolution 7 audio card to my Sunfire TG4 processor. I use DFX Audio Enhancer to improve the fidelity of my Windows Media downloads,
http://www.fxsound.com/ .It was DFX that boosted the quality of my PC to surpass CD's,,,, in spades I might add. An old friend, Witchdoctor, turned me onto this addon and I've discarded CD's in favor of a backup hard drive for my library's security. Now days, I can compare CD's to cassettes,,,,, except I'm still burning CD-s for my car.

Robin