To save the poor server here from being filled up with my crap I upload my images to one of my personal web servers and use the linkie thing to put as many images per post as I want... It's that cool IMG button on top when you edit a post. But you should still be respectfull of file size, download time can be a b__ch if the file is too large. I try to keep mine below 200K (750pixels X 400 pixels) if all possible.
The code looks like this:
CODE
[IMG]http://www.rockaria.com/914/914yrule.jpg[/IMG]
[IMG]http://www.rockaria.com/914/914yel1.jpg[/IMG]
to do this: