Use filter directly without register.

I put a possible method here and seek for some help.
It's not a easy job to teach each user how to register a filter, and it's not cool yet to ask user for registering a filter.
This method was actually in my first media build for atrac3plus filter. Based on the reports,
for x86, this method should work fine.
However, I'm not sure how it works for x64.
Or if there's another way to do that, that's fine :)