i worked on a website in the latest firefox and then presented it on a machine that just had ie6 (and it looked horrible). is there anyway i can test what it will look like in
You can upload your website to some free hosting provider. Then use http://browsershots.org/ to test your website in almost all the available browsers (incl IE6).
The website will take screen shots of your website.
you can try
http://browsershots.org/
http://crossbrowsertesting.com/
and the one i like most 'https://browserlab.adobe.com/index.html#'
Online service:
Browser Shots
Locally on your machine:
VirtualBox
Web based alternatives: (by providing screenshots) http://netrenderer.com/index.php
Adobe's BrowserLab is a great service if all you need is a screenshot. However, if you need to test the interaction with the site, MultipleIE can install IE6 as well as previous versions (not really necessary, though).
If you're looking for tons of browsers and just screenshot functionality, BrowserShots is another great tool.
I use Microsoft Virtual PC, and IETester. But when I need a quick preview (or am traveling with my MacBook Pro) Adobe Browser Lab is Awesome! You can't test interactivity, but display bugs you can test very quickly.