Iansproson, I can help.
The method Satinstain explained works. But there is a better method for posting pictures here without sacrificing picture quality. It's also probably quicker than fumbling through paint. The answer is thumbnails.
I'm sure you are familiar with the image hosting sites used to store your picture collection online right? Like photobucket.com, imagebam.com, imagevenue.com, postimage.org and etc. Just upload your pics to one of these sites. It's also a great way to back up your photos if you ever lose your harddrive.
Anyway, once you upload your pic, there are options next to it that might say..."show codes" Go there...
and you'll see something like this:http://postimage.org/image/b313ui573/code/
Then all you do is Copy the one that suggests "thumbnails for forums." Go and paste that directing into your satinforum message and BAM, you'll see this picture below....
^click and behold how amazing the resolution is!Note:
The above picture is like 2,000 KBs, yet I posted it with ease.
Honestly, it's ridiculous that uploads here are restricted to the 256k. But you can bypass all that using the method I described.
There is a 2nd method as well, that involves using the IMG button, but I don't want to overwhelm you. lol
Message me if you have any questions!