You can upload more than one picture at a time then can use the drop down on the file attachment in edit menu to have multiple selections.
Also if you want the picture to be full size in your post instead of a thumb nail, instead of posting hit preview, then in preview click on the preview picture and when it is enlarged right click and copy. Now go back down to the edit pane and right click and paste where you want it, you can paste it over the attached file code. Now if you hit preview again it will be full sized. When you have it the way you want hit post.
How does the stereo sound?