Here are some of my promised contributions. Have a look if you can need it, otherwhise you don't have to use them.
First, I added the script.aculo.us package (Javascript library with tons of effects,
http://script.aculo.us ), because I think some movements are always nice and one doesn't have to re-invent the wheel everytime. I hope that will find its way into CPG1.5, because I think it's a great lib and it makes many things very easy.
Another thing I did was that I substituted most of the tables with div-containers except if the content was really table-like or the alignment would be too hard to do otherwhise. With the new containers I also changed the CSS a bit and additionally I added a little JS so that the versioncheck-table can be collapsed/expanded (probably TODO: collapsed if no error/expanded when error found).
Just a minor change with the images of the 10 steps: they were a bit too small, so I modified them to be 21x21px.
Attached:
* screenshot of the first step
* svn-diff of my changes (with scriptaculous)
* zip with the modified images