Can somebody give me a tip how to takle the following problem...

With Nero Digital I rip a DVD to MP4 format including subtitles and langauge soundtracks. These subtitles and soundtracks can be selected without any problem within Nero Showtime.

But Having Windows Media Centre 2005 I'd like the convenience of starting a film with my remote and be able to choose language and subtitle. Now only the default language is played without subtitles. Please advise!

PS! I put the same question to Nero without getting an answer...