DotNetNuke Skins and Resources by ThinkofDesign

Hello and compliments for the site.

I'm creating a DNN portal for a friend.
This is the actual header jpg file here http://www.saintpierre.it/deposito/dotnetnuke/xdflower05-scx.jpg

I would like to use a flash file instead (same dimensions) like this one http://www.saintpierre.it/deposito/dotnetnuke/top.swf

But ... lol ... I really don't know how to do this.

Can someone be so kind to give ve some tips, considering I'm not a professional in webmastering?

Thanks a lot for your eventual help.

Ciao
Lexar