I'd like to see 'em, so I will help ye'.
To 'upload' a screenshot - you must go to an image-uploading site. For example, a well-known site would be tinypic.com. I personally use photobucket, but you need an account for that, so just stick with TinyPic for now.
So, once you get there, click the 'Upload File' button and choose your wanted screenshot(Location: C:\FeralHeart\screenshots). Once you get that, click the 'Upload' button and enter the Captcha or keywords(if there is one). If the 'puzzle' is done correctly, you will be brought to a page with image links. Select(copy) the one with the [img] (if I am wrong, I apoligize, it's been a while) and paste it into the main thread(via Edit Post, just in case).
I hope I helped you.
Anyhow, regarding your creations, can't wait to see 'em. ^^