Here is what I just did, like most other chatters do too.
I created a free account with www.photobucket.com
then after I made the account, I imported my pictures into that account.
then after that, I was able to post the pics on Mice Chat.
You see the reason why I did that is because each picture needs an http address in order to show up on Mice chat correctly.
Then when you want to post a picture from photobuckets, or whatever service you choose, you clic on the image icon (the icon in a yellow box with mountains on it at the top of the box where you type your posts) and a grey box will pop up saying http://.(Don't click on this link) Then you post your pictures link in that and click okay. Then whalah, your pic is on Mice Chat. any more questions, just PM me.