1. You need an image editing programme (Photoshop, Photoshop Elements, or PaintShop Pro, etc.) to resize pics. If you don't want or can't do so, you can upload the pic you want to use to a site to an image hosting site like photobucket.com, imageshack.us,
www.villagephotos.com and then paste the link from your pic there into the little box in your profile here where it says "Link to off-site avatar".
2. You have to paste the link to the image you want to use in your signature as

in the signature box in your profile.
3. Your rank change with the number of your posts, as follows
Rank and Minimum Posts
Lieutenant Nil
Captain 100
Major 250
Lieutenant-Colonel 500
Colonel 750
Brigadier 1000
Major-General 1500
You can create your own category (no promotion through the ranks in this case) and PM it to Stevie, who can then make it appear under your username)