Install Porsche Unleashed from your CD. Do not launch it yet.
This is the tricky part. There are three major crack versions floating around. Using the wrong one will crash the game on launch.
For a pure No-CD experience on Windows 11, you want the NFS5.exe from the "NFS Porsche Unleashed v3.5 Fixed No-CD" (Scene release group: RELOADED or RAZOR1911).
Title: Need for Speed: Porsche Unleashed Developer: EA Canada (1999/2000) Platform: PC Component Reviewed: No-CD Crack / Fixed Executable