I did the same, apart from I didn't get as far as adding anything (directly) into the PhpMyAdmin database, because I wasn't even sure where to look!..
(I did however add the code via the "Long Description" field in the product update screen for that product in PowerStore Admin, and I also ticked "Update All")
But after looking at neilo's details (above) I followed the path to my "ps3_products. ProductLongDesc field" and it appears that all of the info is already in there (For all my options!)?..
(See attached image!)..
So where are we supposed to place this code??? :-S