Yes you can use the IE6 PNG filter.
However note that IE6 implementations before the service
packs will not support this either.
And yes there are major installations of IE6 on these older
subversions of IE6. This used to trip me up all the time.
To the point that I no longer bother,
On 2009/04/30 21:43 (GMT+1000) Mathew Robertson composed:
This argument is circular, either a) the company has the coders available
to create the IE6-specific tool and thus can upgrade the tool to use a
later version of the browser, or b) they dont have coders and thus they
couldn't have