Hahahahaha. It's okay. If you want to do thumbnails in your posts click "Go Advanced" and scroll down to where it says "Manage Attachments" and you upload your file. It should then add a little box titled "Thumbnails" to your post.
Alternatively you can copy and paste images right into the post as well. I really hope this is what you were asking and I didn't just make a total fool of myself. And I would feel even worse if I gave you the wrong directions, so I will try it right now to make sure I said what I was trying to say.
This is what following my directions will result in:
Really? Okay, when you click "Go Advanced" you should be able to scroll down (after a few seconds depending on your connection) and find the "Manage Attachments" button.
If it's not there, try this: go to the "User CP" (top left of all pages) and click "Options" on the left-hand list. Scroll down to nearly the bottom under "Miscellenious Options" and confirm that you have "Enhanced Interface" selected in the drop down menu.
Hopefully that will work, let me know if it doesn't and I'll look into it again. Also, I will paste some screen shots of the steps above on my site HERE for you to use. Hope it works!
Your welcome! I don't know why it isn't working... Take a look at the screen shots on my site (link) and if you still can't find it I really don't know what it could be. Check under your User CP again, there should be a button on the right column at the bottom that says "Attachments" which is where all your attachments go. If this is there then theoretically you should be able to add things to it, right? Hahaha...I don't know. I'll look more into it later, sorry I couldn't be of more help!
Not sure why the Upload Manager isn't working for ya. But, until you get it working, you can upload your pics to http://www.isarapix.com and then just copy/paste the bbcode it gives you for your posts.