hi!
is the any skin that puts all the contacts not vertically but horinzontaly in several horizantal lines?i have many contacts and i have allways to scrool the contacts till i founf the one i want...

Not that I know of...
I'm even not sure if this would be possible.

But you can always categorise your contacts into groups.

You can also use the 'word wheel' on top of the contactlist to quickly find particular contacts:

yes but i want to see all my on-line contacts in the screen , without having to use the search function or scrooling in several groups.if they wrere all lined up horizontally in several lines i would see them all...

You can also organize all your contacts by online status.
And/or sort them by status or alphabetic order.
You can also choose to show or hide offline contacts.
Or any combination of the above.

I suggest you take a look at Messenger's preferences.
In Windows Live Messenger 2009: Tools > Options > Layout

If I recall correctly, this has been discussed before, and cannot be done with a skin.

Feel free to correct me though.