Need to know how to change buttons

[Bush Music]

Hi all.
I have some buttons that I want to replace on 3.0 Beta 5
These are the buttons I would like to replace below.
Forum Contains New Posts
Forum Contains No New Posts
Forum is Closed for Posting

I just need to know what to do so that I can replace the above with my custom buttons.
Thanks in advance!

[Dean C]

Right click on the image and find the filename. Then upload the new images overwriting the old one's :)