Starrett2008

Hello, We have an NT4.0 domain and were going to migrate to 2003 AD and Exchange2003 mixed mode. Management would like to know what we need to do to upgrade to 2008 AD and Exchange2007. Concerns: We have a third of all computers still running Window9598 We have 3 Production applications that require share/NTFS permissions to access (the Apps only run on WindowsNT). Questions: 1) Can NT still exist in an 2008AD/2007Exchng infrastructure? 2) Can 2008 user accounts connect to WindowsNT server shares in this structure? 3) What alternatives could I use to allow connectivity from 2008AD to WindowsNT server shares?