This is a quick and dirty hack I use to kill the zombie processes left after running an ies4linux install of Internet Explorer 6.

#!/bin/sh
ps -ef | grep wineserver | awk '{ print $2 }' | xargs kill -9
ps -ef | grep explorer.exe | awk '{ print $2 }' | xargs kill -9 
ps -ef | grep ie6 | awk '{ print $2 }'| xargs kill -9

Unfortunately this script does try to kill some of it's own processes but not before doing the job.

If you can think of a better way I'd be interested in hearing it.