question about product description

Hi there ..

I wanted to add some images in the products descriptions sometimes .. is that possible ? I tried to ... but it seems like it cleans up html... is there a way to avoid this ?

thanks for your answer ...
Actually ... I don't know what's goig on .. on some products ... it doesn't show images on some others it does .. I created a new product .. just copied and paste to a new one ... and it's working ...
Another thing .. on some products ... variants are not working anymore .. And I can't generate them automatically ...if I had some manually .. it's working ...
weird !!

Another thing ... another question
I wanted to add related products only on product view show.php .. but I can't figure out how to do this ? it does add the module on all pages ... any ideas how I could achieve this ?

Actually I found out .. what it was all about .. by mistake I created a product in the root category that's why the module was showing everywhere ...

thanks