Help With converting px to em...

So, I thought that I would have a go at converting a site from all px to em to help with accessibility and using browser zoom. I wish I'd never started!
This is how I approached it.
     1) Set my font to 100%
     2) Change all font sizes to em
     3) Feel smug
     4) Notice that after a couple of ramps up on the zoom the layout goes pear-shaped
     5) Change all width/height dimensions to em
     6) Change all padding/margin dimensions to em
     7) Feel a little tearful
     8) Realise I don't have a back-up style sheet
     9) Re-draw WWW domination plan
     10) Start to make a little progress
     11) Try out the negative zoom
     12) See that screw my layout - don't understand it
     14) Add some min-width/min-height rules
     12) Feel a little tearful...
     13) Came here to be with friends
I worked out I think, that using flexible units in a fixed environment is going to cause problems.
I'm having trouble with layout more than text-size. I think the only thing that will cause me grief with text-size is with nested element and the way that em is inherited but, the site is quite straight forward, apart from a few floated elements.
I thnk my main problems are with the layout: Images, background images and how to approach the whold width/height thing.
Martin
PS I won't be at my PC for a while so, if you respond and I don't come back to you, it's not because I'm not interested. I'm too ashamed and confused to post a live page!

Hi Martin
The one thing that confuses people when converting from px to em units is that they think px is a fixed size and em's are flexible, which unfortunately is not true, and just to confuse things even more Microsoft even treat px's as a relative size, (this is actually correct if you look at the css1 spec).
The best advice I can offer is to start with the layout when converting to em's and worry about the font etc. later, because as they say a pixel is relative.
PZ

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From: [email protected]
To: [email protected]
Subject: help with converting a Nero file
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