While Grain Surgery 2 was a staple for Photoshop 7.0 users, its lifecycle as a standalone plug-in ended several years ago: Legacy Tool:
Used for extracting grain profiles from high-quality film scans. History and Legacy Grain Surgery 2 Adobe Photoshop 7.0 Plug-in -PATCHED
Since Grain Surgery is discontinued and difficult to run legally on modern systems, most photographers and retouchers now use modern alternatives for grain removal and addition: While Grain Surgery 2 was a staple for Photoshop 7
: Navigate to your Photoshop installation directory, typically found at C:\Program Files\Adobe\Photoshop 7.0\Plug-ins Extract Files Grain Surgery 2 Adobe Photoshop 7.0 Plug-in -PATCHED
Is Grain Surgery 2 better than modern tools? No. Topaz Labs and Neat Video obliterate it in terms of artifact-free output.