windows messenger and basic install of msn6

> ok so i did this really stupid thing...tried to remove
> windows messenger without reading any of your helpful
> posts and finding out its not very easy. in the process i
> have foolishly deleted the msn add in which connects my
> messenger to my hotmail account and allows me to access
> personal profiles. the link to get this add in on all the
> websites i have found takes me to the new msn6 download
> page.
>
> this wouldnt be a problem and i would be very happy with
> msn6 but i can't seem to install it. the download and
> install appear to complete correctly but msn6
> then "encounters a problem and needs to close" before it
> even opens. I have tried the download several times over
> the past week but am running out of ideas, and as my
> windows messenger is also on the blink my contact with
> internet buddies is in peril! please help!
>
> thankyou, from a very confused and frustrated student.