Someone helped me at google-groups for Cufon and transparency problem wit IE. He coded a lot of CSS-tricks so my p-elements would have some kind of 'masked' background of it's parent-div with holds the background-image property. IE will look like it should have initially (damn Microsoft)! So i thought "wouldn't it be easier to let jQuery figure out which part of the image will be shown?!"
Have a jQuery script which will calculate the background-position for the html-element it will be assigned to, recalculates the position if element has different position (centered fixed html/CSS) AND you could assign which parent of the html-element will hold the background-image property. Take for all concerning elements left, top as reference (maybe assigned with jQuery). Isn't this all we need?!
code like;
$('p#maskedBackground').recalculate('parentElement'[, width, height])
And returns for example background-position: 12px -134px