I need a little help on the song Crusade...Well,i've figured out 99% of the song and i just can't find out one simple chord and in addition i can't find it's arpeggio...To be more specific,in the arpeggio part of the song u can hear the following chords:
D->Bb->D->Bb->C (in 5.54 minute of the song)
Then u can hear the same progression for one more time...
and in 6.17 minute u can hear
D->??->D->?? (x2)
PLEEEEAZEEE HEEEEEELP MEEEE 

fill the blankssssssssssssssssssssssss o_O