Rename the original speed2.exe to speed2.exe.bak for safety. Copy and paste the new cracked speed2.exe into this folder.
To play on modern systems without the original discs, using a No-CD crack from sites like GameCopyWorld is a common solution. Retail copies often fail to launch on Windows 10 and 11 due to the retired SafeDisc DRM . How to Use the No-CD Crack from GameCopyWorld