Wow guess what this was easy to do, now, can I explain how to do it is the thing!!
Well here goes.
1. Go to the Aimoo site make sure you are logged on
2 just below the title of the site you will find
Today Profile Member Search ........
Click on Profile it will open another page.
3 this page is your profile click on Edit and from there you can Edit the information and also alter or choose a thing called an Avatar there are a number available under the button other images
But you can also choose one of your own from your own photo folder. so Choose Browse
Now this bit I am not sure of but it should be a jpg or gif image that is it must end with .jpg or .gif I think there was another you can use but I am not sure.
If you get the message after you have clicked the SUBMIT button down the bottom then it is most likely the wrong type of picture in which case choose again or convert the format.
4 fix anything else while you are there such as your time zone or place you live or add a signature to be put on every post you send
5 and then click SUBMIT this is most important !!
6 go back to the site and send some one a message to test out that you have done it correctly
Bleggy