Hello. This is most likely due to a corporate (volume) Windows XP license. Although you may be licensed for X number of machines, the Product Key (CD Key) may be the same. Your invoice from IBM should indicate the number of licenses you own and they should be able to shed some light on this for you.
Rest assured, it\'s not a bug in NEWT. This feature has been in our product for 2 years and the feature is quite bug free.