Please do! It's a great pic of the castle and after having only been to WDW that I can remember (I know I've been to DL, but I don't really remember it) it's nice to see such a beautiful picture of the castle there.
To post a picture, all you have to do is join a photosharing site (such as Photobucket) (it's free by the way). Then, on photobucket click on upload picture, and find the photo on your comp that you want to upload. Once the photo is uploaded to photobucket, you can see it in your photobucket photo album. Once you see the picture, you will see four options underneath it. click and highlight the last option (it's called the IMG Code). Once it is highlighted (make sure you get ALL of it), simply right click on it, and "copy" it.
Now go back to the Dis board, and simply "paste" that whole IMG Code in the thread you want to post in, and there it is. I would recommend doing a Preview of the post first to make sure it came out alright. If it did, go ahead and post it.
We look forward to seeing what photos you are going to share.