hmmm...that's puzzling why your provider would set it up like that. I suppose you could write them and ask why, and also ask if the parameters could be changed. You could also consider moving to a different provider. If they (a new provider) use MCMA and you have MCPC+ loaded, you will have access to hundreds of bukkit plugins that you can install with a click of the mouse. You can backup/save, shut down the server, install the plugin (remotely, through the MCMA configuration tab), restart the server and test things out. If the plugin is problematic, just delete it through MCMA and keep running, or delete the world and restore from backup. MCMA makes the server admin job much easier.
I know that's not a lot of help with your current problem, but it is an option if you can't find what you need.