Partyk,
there are few issues to solve:
1.) BD-specs:
1080p23.98, 1080p24, (1080i50) or 1080i60
so you can use your 1080p25-material as 1080psf25 within a 1080i50-sequenz, but straight 1080p25 is not supported.
and: it won´t be played in int. BD-players, as 25/50fps-playback is mandatory only for countries that broadcast with 25/50fps, like europe or australia.
doubling the framerate make no sence, same to use 1080pfs25, as it wont be played.
you got two possibilities to make sure your BD would be played in USA:
1.) conform your 1080p25 to 1080p24 and live with 4% slowing down of your video
2.) use the frame-control of compressor and create 1080p24 out of your 1080p25 at the same duration.
but this will take dacades/very, very long time.
last point:
I wouldn´t use MPEG2HD for blu-ray as H264 is much better at lower bitrates, and compressor can do it.
cheers
danny