For adding other things, you can paste the code wherever you want; Interests, About me, Music..etc. Depends on where you want the stuff at on your page. Just hit the "Enter" button a few times to put spaces inbetween different codes in case you don't want something later, it's easier to find and delete. And there is no reason to delete your background code, unless you dont want it, or want a new one.
And for adding things like sparkles, and fading effects to your pictures, you need photoshop, or a photo generator site. If you want your pictures on your page, then you need to upload them on a site like http://www.photobucket.com or http://www.tinypic.com copy the html code they give you and paste them somewhere in your 'About me' section, or in a section that you want them to appear on your site.
There are also ways you can put pics into scrollboxes, so they don't take up so much space and people can scroll through them.
I make layouts, contact tables, graphics...name it. If you ever need any help, or want something imparticular just send me a message through my myspace. It's http://www.myspace.com/wittymelon455
I don't have a layout site or anything, just do it for fun or for whenever someone wants or needs anything. Let me know.
Good luck! ;)