You're on a really old plan (adenhanced, even, although we don't give you ads anymore so it's more like just extra stuff for free). While I could bump you to the unmetered plan, you would drop down to 2 MySQL databases, 3 FTP accounts, 3 email accounts, 2 addon domains, 2 subdomains, and only 1 parked domain (all of which is a lot less than what you currently have).
If you still want to do this, then post back. The change is one-way only, once we change you to the new plan we cannot change you back.
I didn't know that, so thanks for explaining! But I'm currently not using more than the available features in the unmetered plan and the unmetered sounds very appealing, so if you could change it for me, I would very much appreciate it!