Hi,
The solution given by Xavier requires Mootools and more precisely, a support for Squeezebox.
Like I wrote in the other thread ; it requires some customization. You can take a look at the view "product / show_block_img" to see how an image popup is generated in HikaShop.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.