Hi
Thanks for the post - by the way, I'm working on your other posts at the moment and will answer them in due course.
To put a/v content in your product info page, you don't need to add php code in the product description. The best way is as follows:
1) Create a new position in CineSound - call it something like 'Product Info'
2) Add the code you pasted in your last post (but change 'Index Default' to 'Product Info'

into the required position in your product_info.php file. You may need to do a bit of tweaking with the HTML to get the required presentation.
3) Create a clip for each product. For each clip, use 'products_id=XX' as the URL Substring, using the product id of the product instead of XX.
This way, you can use the same position to display clips for any product.
I'm not sure why the PHP tags are being replaced in fckeditor. As a longshot, you could have a look at fckeditor/fckconfig.js. Search for a line that looks like
| Code: |
FCKConfig.ProtectedSource.Add( /<\?[\s\S]*?\?>/g ) ; // PHP style server side code
|
and comment/uncomment as required.
Hope this helps
Nick