To remove windows messenger from loading when outlook 6 starts follow these steps.
start - run - in the box type gpedit.msc.
A window will appear
in that select
local computer policy - Administrative Templates - windows components - Windows Messenger
In the right pane you will have two options and you can double click them and choose enable.
Start outlook. go to tools - general and disable messenger option from auto logging if present.
this is for windows messenger and not for msn messenger.