to disable the default roundspanel, open includes/manialinks.inc.php and...

find the line:

'<round_scores visible="' . bool2text($ml_custom_ui['round_scores']) . '"/>' .

it is about the last 10 lines. and change to:

'<round_scores visible="false"/>' .

then save. now it should not be displayed any more and you have a free view on the new plugin 
cause of that we can make the new panel for the roundspoints transparent

WARNING: YOU HAVE TO ENABLE THE RPOINTS PLUGIN IN pluginx.xml!

In your config.xml you must add the default_rpoints, like:

<default_rpoints>f1gp</default_rpoints>