I need make changes to Pligg CMS Script

I have a Pligg script, and I need to limit the results For example, if I have 1000 posts, the script displays 1000 posts and on every page 10 posts The problem is that in the case of a lot of posts the page is very slow, so I need to add limit 1000 to 300 posts in php I do not have a test. You must do it yourself. "You must have a live Pligg script" The script: [login to view URL] The project is simple and only takes a few minutes for a Pligg script expert, so the budget is low