MOH AA disc#2

[Beentheredunthat]

Hi There.
I always come back to this fountain of info place if i am stumped so here goes.
I have backed up disc 1 of moh But disc 2 is a no go.
I am using Nero 5.5
win me.
evertime it starts to read #2 it gets to 3% ,hangs there for around 2 minutes and then goes to 100%.......please install an empty medium .bla,bla,bla so i do......But after trying to install it I get to 49% of the first disc..It asks me for the second disc so i slap it in and the install prog tells me some files are missing.............any help would be dealdy .thnx in advance.