Hi,
The list uses the Joomla "JPane" Accordion system which use the Mootools "Fx.Accordion" feature.
It is possible to change the event of the trigger (not "click" but "hover") but the problem is, there is no option in Joomla to set the value.
But it might be possible to override it by javascript, by unloading the accordion and recreate it with better parameters.
It requires some PHP/Javascript skills.
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.