s2sp64ship.exe (often referred to as game_ship.exe game_steam_ship.exe ) is the primary executable file for modern Call of Duty titles, including Modern Warfare II Modern Warfare III
If you meant something like spsetup64.exe (common for some printer drivers) or s2sp64 relates to a specific application, let me know more about where you saw it — I’ll help you track down the safe, official download link. s2sp64shipexe download new
The transition from N64 hardware to PC allows for significant performance and quality-of-life upgrades: s2sp64ship