As it says in teh title, we need an infinite scroll script installed on our product listing pages to replace what we have at the moment:
Items Per Page: 100 |200|300|400|View All [Prev] Page 4 of 19 [Next]
Sort of like Twitter pagination.
This needs to install on all product listing pages and in one of our customer gallery pages.
It's a Zen Cart store v.1.3.8.c