How do i change status Icons
 

How do i upload my new status icons to the site and then change from the old ones to the new?

Sorry, this is all very new to me.

Use an ftp client to upload them to your site. Most people create a new folder in the images folder called /styles and then name their style and then put the custom stuff in there. So, if you have a style called 'mine', you would create a folder in /styles/mine called statusicon and put your new images in there. Then go to Styles & Templates > Style Manager > find your style > select StyleVars and go down and change the path in the imagepaths stylevar imgdir_statusicon to your new directory