WordPress.org

What should I do in the configuration page

I've provided further information about configuring the plugin in my blog: 'http://www.hudatoriq.web.id/wp-hacks/ym-online-status'.

How do I use my custom images as YM status button

It's simple. Create a pair of images (online and offline button), Upload those images into /wp-content/plugins/ym-online-status/images/. See about the rules of naming the images at the plugin page http://www.hudatoriq.web.id/wp-hacks/ym-online-status