I put the prompt in the C:\WINDOWS
What do you mean by that?
?
You just have to add the reg to the registry by double clicking it, and change the path IF you did not install windows in the default fodler (C:\Windows)
Sp2 is not guilty, the registry can be modified with it, without any problems
You can also add it manually
Execute > Regedit
the go to HKEY_Classes_Root > Folder > Shell
Right click : New > Key
Name the Key DOS
You now have a DOS folder with a "default" string, edit that string, this is what will appear when right clicking a folder, so put everything you want in it, like "DOS prompt"
Right Click the folder DOS > New > Key
Name the key Command
Right click on it > New > String
The string will be named "default"
Put this command line in it "c:\Windows\system32\cmd.exe" /k cd "%L"
This works in any Windows OS, in every Service pack