I don't bother much with parchment paper. I create the image in photoshop, then throw in some stains or whatever. It sounds like you have help already, but I'm willing to help if needed. The front of the invite could be done with some added embossing and trim. Something similar to the Halmark talking spell book.
spell page example...
I'm with Britishwitch...I want to know what you put together for this party. Please share.