Ubuntu :: Match Window To Customized Firefox Profile Icon In Docky?

I am running Ubuntu 10.04 desktop AMD-64 on an HP DV4-2000 laptop. I have Docky running on the left side, desktop disabled and wallpapers for my four desktops. I recently killed the bottom panel (yes, it's a poor-man's 11.04).

Those details, I don't think, will have any bearing on the problem at hand, but one never knows. So, I have three different Firefox profiles I run-- the default, which has all the plugins, a stripped-down one which I use for my daily reading (I follow a number of sites using the Morning Coffee plugin), and another stripped one for my local WordPress install.

My problem is this-- I have created three separate launchers on my Desktop, one for each firefox profile. They each have their own icons, and I have successfully imported them each into Docky.

By the way, if you have problems with getting a different icon to show in Docky, open up the launcher with a text editor such as gedit and make sure that both icon listings are pointing to the one you want to use. Example:

Code:
[Desktop Entry]
Version=1.0
Type=Application

[Code]...

The first icon listing is what Docky uses, the second is what the Launcher file itself looks like. the problem-- When I click on the appropriate icon, I get an instance of Firefox under the correct profile. However, Docky throws the window under the generic Firefox icon, so if I pull up the dock, there might be three instances of firefox running under the firefox icon and nothing under the icons of the other two profile launchers.

I want to be able to click on the Wordpress profile icon and get the Wordpress window that is already open (instead of getting a warning that Firefox is already running... I know that).

I found this page which tells me how to fix a Chrome problem of similar nature, however, when I try to use the command xprop I get nothing. I left it running for fifteen minutes until I gave up and did a ^C to recover my terminal.

So, my problem, as I see it, is this-- I'm running Firefox in all three cases, which Docky correctly interprets. This isn't a java implementation where I can point at the correct Java attribute.