You go on to imageshack, log in or sign up, open a paint file or whatever your drawing program is, make it smaller, save it, go back to imageshack and it should be on Media Upload. Select the file you want to upload, change the size to avatar, and upload. If your logged in it should have a button that says "full size". Press it. Copy the url on the search bar, and paste it on the avatar change area where it says custom avatar in the url section. Press save changes and presto! You have a new custom avatar! Hope I helped! (And spelled everything right
Nah, thanks! Yours looks quite cool, but I don´t want one as my avy because I´m happy with my current ava! But still thanks! I appreciate that you wanted to make one for me! Oh, and of course I´d have credited you! That´s important advertisment and if I wouldn´t do so, it´d be plagiarism and very impolite!
You can't just copy them directly but it's still almost as easy. Save the image to your computer and upload it in the internet. This is the site I use: http://tinypic.com/ (there's some others like Photobucket, Imageshack, etc.)
After you have uploaded the image, you just have to copy the image code that it gives to you and put it in your post.
You need to save your file in JPG or PNG format. Paint normally saves files in bitmap format, which is not an acceptable file format here. On Paint, go to file > Save As > At "Save As Type" Click on that bar, and find either JPG or PNG. Click save and you're done!
It can also be that your avatar might be too big in terms of file size.