The way I see it this is an aspx page. The flash part is only the right part where you type the text. Similar products - like choosing the color and garment you want can be made with Flash though, the complication depends on the number of garments and designs you have and the additional functions you want - if larger this becomes a whole application, so it is not an easy task to make.
So far as i see it. This page has no Flash at all!
You can easily check if soemthing is flash by right clicking it, if it is flash, at the bottom of the list that popped up when ypu right clicked you will see something like "About Adobe Flash Player"
Like on this site, the photo album is flash.. try right clicking it and you will see.
I have to seen in that webiste, they are not using any flash in that site, when you see the flash website you have find easlily. at the same time you can get confused also. see this site http://www.web-designs-company.com , here you have get confussion. here you can make question for you? they are used here java script or flash ? at the time what you have to do.
place the mouse scroller in that banner - and right click - you can view.
I see that you didn't develop what you want it in your website. I can help you to create this 3 steps interactive with flash or without flash also I can help you to implement it in your website.
Martin @ Email Marketing Software
Europe, Middle East and Africa