you can accomplish this but will take a small bit of coding. once you have designed your custom template files after the fashion of the regular block template files, but with your design ideas, you will then have to throw some if-else statements into the plugin's PHP code in functions.inc. The function plugin_centerblock_staticpages is what you'll be looking for. I think. so something like "if position is top, then use this template, elseif position is bottom, then use this template... etc." (not true PHP )
If there is an easier way, I don't know what it is.