Weaver,
Don't think I have seen you around much. Maybe I have just missed your input. Anyway, Congrats on the job.
Now, after you click on the 'Post' button down at the bottom left of this box, when it posts it you will have a new bar at the bottom with buttons for 'edit', 'attach', etc. When you click the attach button you will be able to 'browse' through your files and attach your pics. I believe it will take some fair sized files so you hopefully won't need to downsize them first. But if it tells you they are too large, just use your pic manager and downsize for web size pics. Usually quite a bit smaller in pixels than where most of us shoot.
Let us know if you still have problems, and remember, this is from one of the most computer illiterate people on the forum.
Have a Great Day, Brent