Best way to structure links on a discussion forum webpage

[newtoasp]

Hi,

I have a discussion forum on my website. Currently I display all the messages in the same page, forum.asp. But it is growing rapidly and I would like to display only the top 100 posts in the main forum.asp page.

Can any one tell me what is the best way to have links to the old posts. I was thinking of having a 'Show Next 100' link. So the main page will be forum.asp, the link on this page for the next 100, forum.asp?next=100, then forum.asp?next=200 and so on. Is it ok to do it this way? Is there a better way to structure my links to make google like it?

Thanks.