Mike,
    You will need to download the "User Agent Switcher Extension" for 
Firefox (http://www.chrispederick.com/work/firefox/useragentswitcher/).  
Once you've done that, create an alternate user agent (in the extension 
options, Tools|User Agent Switcher|Options|Options)  with the following 
characteristics:

Description:
    Internet Explorer 6 (Windows)

User Agent:
    Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 0.0.0; 
.NET CLR 0.0.0)

App Name:
     Microsoft Internet Explorer

App Version:
    4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 0.0.0; .NET CLR 
0.0.0)

Platform:
    win32

Vendor:
    <Leave Blank>
Vendor Sub:
    <Leave Blank>


P.S. Note, Firefox 1.0 has a serious bug in that if the user agent 
string is longer than about 90 characters Firefox will crash on startup, 
so make sure you allow the extension to reset the user agent to default 
when Firefox Closes.


mhoy4@cox.net wrote:

> Hi,
>
> I need to access my boss' backoffice signon screen for his site. I use 
> firefox. when i try to sign on using firefox i get this funny error:
>
> You need to use Internet Explorer version 4.0 or newer to access this 
> Back Office. Other browsers are not advanced enough to properly handle 
> the Back Office tools.
>
> how do I use firefox with this page?
>
> i've heard of people changing the browser somehow.
>
> tia,
>
> mike hoy
>