That’s quite easy actually:
If you do have access to your files, go to /wp-admin/, and open edit-comments.php with any text editor. [don’t forget to keep the original copy – if anything goes wrong]
Line 185 should look like this:
$comments_per_page = apply_filters('comments_per_page', 20, $comment_status);
The number 20 defines the filter on the page. Replace it with the number of comments u’d like to display, and upload ur new file over the old one.
Remember not to go to high with tha number of comments to show, to prevent overload.
Goodluck!
