While you shouldn't download cracked games today (due to malware risks on modern torrent sites), the term "Port Royale 3-SKIDROW" evokes nostalgia for an era when DRM was intrusive and cracking groups were folk heroes.
If you were installing Port Royale 3-SKIDROW on Windows 7 in 2012, the steps were: Port Royale 3-SKIDROW