Firefox 3 virus scanning ability

I have an idea that I've been throwing around since learning that Firefox 3 scans downloaded files ( http://www.ghacks.net/2008/06/04/disable-automatic-virus-scanning-in-fir... ), using locally installed virus scanning software... that is, is there a way to change that setting in order to stipulate that Firefox Portable use ClamWin Portable instead? This way, Firefox Portable 3 would still be entirely portable, instead of relying on software (virus scanner) installed on the local machine.

So far all I've come up with is to use Download Statusbar ( https://addons.mozilla.org/en-US/firefox/addon/26 ) , and set the "Anti-Virus program location" as your copy of ClamWinPortable.exe. There are two problems that I've identified so far:

1) you must know the commands to pass along in the "Arguments" field ( http://dlstatusbar.proboards43.com/index.cgi?board=dlscan&action=display... or type "clamwinportable.exe --help" (w/o quotes) in a command prompt which is currently in the folder which contains clamwinportable.exe), and

2) the addon requires the full path be specified, and not just the relative path.

I would imagine there might be an entry in about:config, but so far I've found nothing.

Any ideas, anyone??? I think this is a worthwhile question, as it affects the portability of everyone's beloved Firefox Portable. Opinions?

P.S. - a related idea: once this concept is accomplished, go the next step and have ClamWin auto-update before scanning any downloaded files. So far I have ClamWin do this anyhow (see below), but I'm not yet sure how you might implement this when it auto-scans downloaded files.

Create a batch file, located in the root of the folder containing ClamWinPortable.exe, with the following contents:

start /wait ClamWinPortable.exe --mode=update --close
start ClamWinPortable.exe

Launch ClamWin using that batch file.