I've heard of this entry in the FSX.cfgWhat exactly does it do? The default is 5 (well on my system)And in the tile proxy forum someone said to put it at 50....well it makes the blurries worse for me....after flying the textures just get mushier and mushier (if that's a word)So anyway, what does it do?

As Phil explained it is a value assigned at installation of FS thatdetermines what the default settings are depending on your hardwareand settings.

I left that to the default. Changing that does little for me. So far.The first two tweaks in Phil's Blog is where the answer to our issues lie. IMO.

Ok, well my next question is does FSX set out affinity to 1, 3, etc if our pc's have single or dual core, respectively?IE, do we have to set it if we have a single core?

Yes, it sets that by default. But if you want to adjust it, then you need to have that parameter explicitly mentioned.Manny