How is it that you're just now installing these older versions of NX, that is NX 7.5 (released 4+ years ago) and NX 6.0 (released 5+ years ago), for what appears to be the first time, based on the questions that you're asking? If you came by these copies of the software legitimately then you should already have access to that information, either on-line or from the organization that you PURCHASED the software from.
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA Siemens PLM: UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.