[Plugin Help] Pagination hacking, very small question

Okay basically right now wordpress allows you to limit X posts per page. It’s global for all pages such as front page, and your archives from what I know.

I limited in my settings 1 post per page. Only issue with that is – when viewing archives it’ll show one post per page. So I was working on a personal plug-in that modified the mysql query and pagination that displayed when viewing archives.

//Archives per page
$g4mr_per_page = 10;

//DONT EDIT BELOW
add_filter('post_limits', 'archive_per_page_g4mr', 10, 2);

function archive_per_page_g4mr($limits, $class) {
	global $g4mr_per_page, $wp_query;

	if(is_archive()) {
		$page = isset($class->query_vars['paged']) ? $class->query_vars['paged'] : 1;
		$page = $page <= 1 ? 1 : $page;

		$limit = @explode(", ", $limits);
		if($limit[1] <= 1) {
			$pstrt = ($page - 1) * $g4mr_per_page . ', ';
			$limits = 'LIMIT ' . $pstrt . $g4mr_per_page;
		}
	}

	return $limits;
}

Example: http://www.g4mr.net/2010/03/

Everything works as expected except I have no clue on how to actually make my script work with the following functions:

next_posts_link
previous_posts_link

From what I seen in the source, the above functions are based on the global $wp_query->max_num_pages variable.

Is there a way to access and modify this variable correctly so my paging works better. I mean I have no problem with it right now, it’ll just have the “Previous posts” link on like every page practically.

Thanks for the support.