As said before, images can be aligned already by placing spaces like this:
{{ wiki:dokuwiki-128.png}}
{{wiki:dokuwiki-128.png }}
{{ wiki:dokuwiki-128.png }}
All other content, including tables could be aligned using the plugin "side_note"
http://wiki.splitbrain.org/plugin:side_note Just change the css markup, so it fits your needs.
I think, this task can be closed.