Creating Custom Header

I’m managing a wordpress site for someone else and we”re looking to change the header. It’s custom made so I don’t know where to go to get rid of the old one. Also, We’re trying to make a flash header with pictures and text to go in it’s place but that seems to be beyond my skill level as far as adobe and photoshop go. Are there any wordpress templates or themes that have flash headers we could use instead? Or should we pay someone to make it for us?