Have you tried the panel in CS4? I'd be curious to know if it works.
I think the panel was developed for CS5 and has been refined in CS6. As a new feature, it's not something that'd typically be extended to a previous version, but that doesn't necessarily mean that it wouldn't work. I'm glad that you found the link for it in the Adobe Labs site; there was an article about the CSS3 mobile pack in the Adobe Developer Connection, but unfortunately the link to that article that has been overwritten by an updated version for CS6.
I couldn't find a link to the original article; however, you might be interested in the following articles involving CS4 and HTML/CSS:
Thanks for your reply.
I recently watched a video by Dave Hogue called 'I didn't know Fireworks could do that' (http://tv.adobe.com/watch/max-2011-design/i-didnt-know-fireworks-could-do-that/as for anyone interested) as I do not use Fireworks and was not really sure what it did. I currently create websites using Dreamweaver and any graphics in Illustrator, but I'm keen to learn CSS3. Dave demonstrated how to export a rectangle with a gradient fill into CSS3 (around 48 mins into the video, again for anyone interested) for all browsers. I thought that this would be a useful aid to learning CSS3.
I will have a read of the articles - thanks for those, and will think about having a go with the CS5 download.
Many thanks again for taking the time to reply.
If the FW panel doesn't work, there are a billion-and-one online tools to aid in learning CSS3 these days. For instance:
These are mostly designed to generate CSS based on your graphic or properties input. A good way to actually learn CSS is to find a good book (or online resource) on the subject and play with the code in Dreamweaver or using something like the Web Developer Toolbar extension for Firefox, which has a CSS Edit feature that allows you to edit CSS of a web site "on the fly".
Then there's always demos and articles that you can find on creative applications of CSS3. These can be educational or inspiring: