mateials with msmooth

[Fl0]

everydays problem,...
Today i moddeled an Ipod. I assainged the materials Without meshsmooth (i think it isnt possible when msmooth is enabled). But when i put meshsmooth on the object the materials got wrong

[XSImatrix]

seperate the peices that are different colours, but from what i remeber and ipod is 3 peiced front , back and screen , so just assining different material ID for the diff areas.