You can either upload it trough these forums, if you reply (not quick reply), and scroll down to beneath the smilies. There should be a button quick upload there, which should open a pop up for you.
Or you can upload your image to websites like imageshack.us, and copy the url and putting it between [im g] [/ img] tags (without spaces)
yes.... thats one way... just below the smiles in the advanced post mode.... it says [open] [quick upload] < that last one
OR... you can use attachments..... again in "Go Advanced" ... below the smiles and all that...it appears many options... use an option that says... "Attach files"...
k one other thing..... I highly recommend you to use .JPEG files (JPG, JPE is the same) .. or .Gif files..... you can also use .bmp and .png files.... but use the JPEG... thats faster and easier.... the size of the image is of no importance
if you don't know how to change the formatof an image.... you can PM me