Thinking about what could be done if it was possible to do what you were asking, places a naughty amile on my face.
I think the best, and the only possible way of doing it is, having a telephone conversation with your hosting company. Believe me by calling your hosting company you would be able to change php.ini file and even copy dll's you'd need.. [probably the files will not be dlls, they'd have .so extension].. I mean they'd do it for you if you really have a reason and if that is acceptable by their security policies.