Using related_posts() in crossposting plugin

Hello!

I would like to try use related posts in the crossposting to livejournal (dreamwidth) plugin.

Is it possible? There are some problems:

1. On default related_posts function has “$echo = true”, but it is need to use it like

$content = $content + related_posts();

And there are other parameters before $echo, and I don’t know will it work if I call related_posts(false) ?

2. Crossposting plugin is not in the LOOP.

http://ww.wp.xz.cn/plugins/yet-another-related-posts-plugin/