WMP 11 Video Acceleration Settings

Could somebody point me to a microsoft or MSDN website that explains the WMP
video acceleration settings? I consulted the help file bundled with WMP, but
it contains no information on these settings whatsoever. I also googled and
searched on these newsgroups, but there are no satisfactory answers
anywhere.

The problem is the following - I have a very old pc and would like to use as
little cpu as possible, even at the cost of the video quality, plus I'd like
my gforce graphics card GPU to do the most work to ease the CPU burden. In
particular, what do the following settings mean and should I check or
uncheck them to reduce both the cpu and gpu load?

video mixing renderer & overlay. It seems both settings are somehow
connected, but should I enable both to reduce cpu load, or just enable
overlay and disable the mixing renderer or vice versa?
quality mode - this one increases the cpu load, am I right?
legacy video renderer
yuv/rgb flipping
video smoothing (or is it called anti-aliasing in the English version of
WMP? I am using the German one) - this one seems to apply to WMV only, but I
am not sure. Also, I think it increases the cpu and gpu load to a very high
extent
DX video acceleration - does this setting actually decrease cpu load by
relying on the gpu capabilities of the graphic card or does it disable the
hardware video card support, using the cpu for rendering instead?
Digital-Video slider from small to large - I set it to small, then to large,
played some videos after changing the setting, didn't see any difference at
all, as far as video quality or performance is concerned. What the hell is
this setting supposed to do? Does it reduce the video quality performance to
ease the cpu burden or does it reduce the hardware graphics card
acceleration, thus increasing the cpu burden? I mean, we are talking about
two contradictory things here, Microsoft got to explain this to WMP users,
otherwise what are these settings for if nobody knows what they mean???!!!!

I'd also like to know whether these settings really apply to all video
files, or just to MS WMV format.
Also, there is a senseless setting, which is supposed to enable switching to
fullscreen mode. No matter whether this checkbox is checked for video files
/ dvds or not, I can always switch to fullscreen mode by doubleclicking the
video. So what is this setting for? Plus, if you set the overall video
acceleration settings to "no acceleration" (pulling the slider to the very
left), this setting is checked, pulling the slider to the right (full video
acceleration) automatically clears the checkbox in the extended video
settings dialog box. But what the hell has this setting got to do with video
acceleration? I just don't understand!

In the extended video acceleration settings of WMP the hardware decoder
radio button is disabled on my computer. Guess, my video card doesn't
support this. So if it doesn't support hardware decoding, do the other video
acceleration settings mean anything at all?


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