Need help instaling Medieval 2 Total War using CD

[Gigantus]

A cyclic redundancy check in a compressed file (cab) usually means that the file is corrupted and that it needs to be downloaded again. But then this is a CD, is it?
Reason I ask is because of the path - there is no 'disk1' in my CD setup. Just a simple d:\data1.cab - D: being the drive the CD is mounted on, the first disk's name (which does not appear in the path, being a mounted disk) is MED2TW_1.

[Basya]

Yah this is the medieval 2 total war gold edition cd