Too many comments, How do I break in pages ?

Hello,

I am running WP 2.5.1 upgraded from 2.3.3… In my blog many of my posts are receiving tooo many comments, and which is slowing down the page loading time and pages are so big now, its hard to even scroll..

Is there any plugin supported by 2.5.1 and compatible to my theme (Not so fresh) which I may use to break the comments in pages which may allow me to show only 10 or may be 15 last comments in a page ??

Thank you..