Horacio said:Man, I think I have been realistic here...
8-10 pages more means a lot more of money in a book, specially if you have already reached one of those "standard page number" printers love, so "adding a few pages" to a book ca be finantially a very bad idea (at least it is what a friend of mine, in a Spanish editorial explained me).
So we must choose between 8 pages of "conversion rules" many people won't use or 8 more pages of d20 Modern specific stuff. I prefer the last, YMMV of course.