Ok thanks a lot for the help. I thought that the padding shrink the text rather than the container (blocks).
Anyway, I made it work on every browser except IE. I tried to add this conditional comment, but I never used conditional comments before so I don’t really know what I’m doing (yes I’m a noob):
This did not work (on IE 6 at least). Does anybody have a solution please?
Here is the pages in question: http://aziz-light.is-a-geek.com/center3boxesPX.html and http://aziz-light.is-a-geek.com/center3boxesEM.html .