Flash/Rotating image header

[saitomedia]

1st. Is there a way to ad a flash file to the website?

Sure, you can add it as a banner, into tpl_header, footer, blank sideboxes by Kuroi, tpl_main_page...etc Zen Cart lets you put it anywhere you desire. Just add in the flash codes into anywhere which also points to the right location of the swf file.

2nd. What is the best way to create and upload a rotating image on a page which rotates every 10 secs or so?

You can use Adobe Flash, Swishmax, or any other softwares to creat a simple flash file that comprise of fade in/out images looping through various 10 second scenes.