How to make an XHTML MP (Mobile profile) override?

Hello,

i'd like to ask, is it possible to validate with override XHTML MP -option? 
I mean, there's no XHTML MP -option in the the Doctype dropdown list, 
although the validator can validate "//WAPFORUM//DTD XHTML Mobile 1.0//EN" 
pages. 

Would it be possible to alter the url "&doctype="-with attribute value, 
which would match XHTML MP?

It seems, that there's no override effect at the http://ready.mobi either.

It would be handy, if one could easily test with override, if some XHTML 
Strict pages are already XTHML MP compliant.

Thanks & regards,
Ville Karinen