Shoutbox

i tryed to put them on but i cant find then on my computer

Skin files are simply ZIP files that have been renamed to a PLSK  file, which Plus! can recognize and automatically unzip/install for you.  Installing a skin is as easy as a double click.

Simply double click the PLSK file you downloaded from the skin database and/or other location, and select "Import".  It will now be available to you under the Messenger Plus! Live Skinning Options. NOTE: If the skin you install is not compatible with the version of Windows Live Messenger you're using, it will appear to be greyed out in preferences.
You must wait for a compatible version to be released OR use a compatible version of Windows Live Messenger.

What do you mean by "Backgrounds"?

Also, please be clear in your terminology.  Windows Live Messenger (WLM) is a chat program (formerly known as MSN Messenger) made by Microsoft, Messenger Plus! Live (MP!L) is an add-on for Windows Live Messenger which adds some extra functionality and features