Rich,
I don't know much about Soviet choppers, but here is a site with at least one good pic of the Firefighting variant of the Mi-6:
http://mysite.wanadoo-members.co.uk/visits2-pages/mos2005_day06.html
More of same from airliners.net :
http://www.airliners.net/open.file/1184816/L/
http://www.airliners.net/open.file/1081707/L/
http://www.airliners.net/open.file/1005267/L/
http://www.airliners.net/open.file/0853943/L/
http://www.airliners.net/open.file/0712838/L/
http://www.airliners.net/open.file/0660662/L/
http://www.airliners.net/open.file/0465081/L/
http://www.airliners.net/open.file/0464496/L/
Here is a shot of snow covered firefighter from rear:
http://www.airliners.net/open.file/0997701/L/
Most of the above are front views, but I thought you might be interested anyway.
Here's a few rear shots of regular Mi-6:
http://www.airliners.net/open.file/1184615/L/
http://www.airliners.net/open.file/0922847/L/
I hope that helps.
Ray