i was sitting mucking around with my keyboard and, completly by accident worked out the main riff in mr X (comes in on 7 seconds)!
i think it goes:
E-------------------D-B
D-E------------------D-F
(the - is to sigify the timing)
or if you were to do it on guitar:
1--12--------10-7--------10-12--------10----13-E
2----------------------------------------------B
3----------------------------------------------G
4----------------------------------------------D
5----------------------------------------------A
6----------------------------------------------E

i think thats how it goes, but it could be wrong laugh