Wonder how ? If you want to render a page or a website in all IE versions starting from 5.5, just try :

A Firefox extension can be found here. 
To add the service to your website paste this code on the body :
<form method="post" id="form" name="form" action="http://ipinfo.info/netrenderer/index.php"
accept-charset="utf-8" target="_blank">
<select name="browser" style="width: 145px;">
<option value="ie8">Internet Explorer 8</option>
<option value="ie7">Internet Explorer 7</option>
<option value="ie6" selected="selected">Internet Explorer 6</option>
<option value="ie55">Internet Explorer 5.5</option>
<option value="ie-mix">IE7-IE6 Mixed</option>
<option value="ie-diff">IE7-IE6 Difference</option></select>
<input name="url" id="url" value="http://" size="61" maxlength="240" type="text">
<input name="go" value="Render" type="submit">
</form>
Another extension for all browsers rendering is available here but it’s still experimental and needs a trial registration to BrowserCam Capture Service.

You can also test your page in 23 browsers with litmus but you’ll have to pay (Only IE7 and FF2 rendering are free)