Point NTLite to your C:\Win7_Source folder. Select the install.wim file (usually containing multiple editions like Home, Pro, Ultimate). Choose the “Windows 7 Professional” edition and click “Load”.
If you are a retro-computing enthusiast, a business with legacy hardware, or simply someone who misses the Aero Glass interface, building a custom Windows 7 Pro “SP2” ISO is a rewarding technical exercise. Just be safe, stay offline when possible, and always, always use legitimate sources. Windows 7 Pro Sp2 Iso