The 1.001 patch was substantial. It did not merely fix crashes; it fundamentally altered the meta-game. A gamemd.exe patched to this version includes the following hardcoded changes:
gamemd.exe Target Application: Command & Conquer: Red Alert 2 – Yuri’s Revenge Version Status: v1.001 (Official Westwood Patch) ** Common Alias:** "The Clean Patch" or "No-CD Hybrid"