From Mess with MSN Messenger:
CustoMess for MSN Messenger and Windows Live Messenger is an automatic installer for quality MSN emoticons, MSN display pictures, conversation window backgrounds, and emoticon fonts. With a minimum of clicks, CustoMess adds your choice of custom content directly into MSN Messenger 7, 7.5 and Windows Live Messenger 8. No more time wasted browsing the Web, saving to your hard drive, adding, and naming each image one by one. No messing around, payments, pin codes, spyware, and adware. New MSN Messenger content, often made by professional artists and cartoonists, is added all the time and surprise specials are offered for major occasions such as Valentine's Day, April Fool's Day, Halloween, and Christmas. Version 2.5 is perfectly compatible with Windows Live Messenger (aka MSN Messenger 8.0), currently in Beta. Also new is an instant background generator, with many more generators in the pipeline.