Im sure Ive had this problem before but I cant remember the answer...

Ive installed IH4 and its all basically working but the link to enlarge images on my product pages is incorrect (I think).

The link code is:

/images/large/image-name__LRG.jpg

But I think it would work fine if it was

/images/image-name.jpg

When I click the image to enlarge it I just get a blank white overlay.

My large folder is there and has all permissions etc but there are no LRG.jpg files within it. The original files I upload when creating a product are the large, full size zoom pictures that I want to use. Im using a template monster theme and it has a lightbox type of setup zoom function.
The thumbnail on the product page is working fine, its from the bmz_cache folder.

Sorry if Ive missed something, searching this thread for LRG.jpg found nothing so I presume this question hasnt been answered before...