Bone,
As for posting pics, you have two options. If you have a photo editor on your computer, you can load the pics then save them ate a lower resolution. Somtimes they call the lower resolution "Best for Web". The "Thumbnail" setting will make for a small file, but a small picture too.
Another option would be to save the picture to an on-line site like photobucket then paste the link in your post. You can post pretty much any size and any number of these. Here are examples of what happens:
This pic is from my photobucket. I pasted in the IMG tag that Photobucket provided:
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Here is a LINK to a short video on Photobucket:
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Here is a pic uploaded with the "Additional Options" on the forum. This option limit the size and/or number of pics, but the are permenent to your post. The above options will disappear if you move or delete them from photobucket.