Install
*DO THIS* Back up your 1.10 DLL files and patch_d2.mpq file.
Put the KoT DLL files and KoT's patch_d2.mpq in the d2 directory.
Run Diablo2 as normal

Uninstall
Use your backup DLL and patch_d2.mpq files and return them to your diablo2 directory.

Please make sure you "ONLY" have 1.10 and KoT's DLL files in your d2 directory before reporting errors.
If you see the error cannot find d3x9.dll, It means you dont have your directX9 installed.