Instead of patching, many modern repacks include an integrated No-CD fix:

The early 2000s was an exciting time for gamers, with numerous first-person shooter games emerging during this period. One such game that captured the attention of many was Project IGI, a tactical first-person shooter developed by Innerloop Studios and released in 2001. The game was praised for its engaging storyline, realistic gameplay, and challenging missions. However, as technology advanced and CD-ROM drives became less common, gamers began searching for alternative ways to play their favorite games without the need for a physical CD.