The best way to post images on the VOID forums is to use an external site like Flickr, Photobucket, or DeviantArt. Then, you just copy the url for the image and insert it in the post like this: [ img ] URL GOES HERE [ /img ] (just make sure to remove all the spaces).
As for the avatar image, it needs to be 50px by 50px. I would suggest saving an image of the character's face, then using whatever image editing software you have to crop it into a 50 x 50 box. Preview on Mac can do this, but if you are using Photoshop, that can do it as well.
The Great Switcheroo
Louise Ambre-Aliona vs. Luniel Gekka
@ 4:23 AM May 2nd