SmartReg 3.4 for Windows Mobile
 If you really know your way around your smartphone or Pocket PC, then SmartReg 3.4 might be just the program you were looking for. It will take care of that registry for you as long as you own a Windows Mobile 2003, 2003SE, 5.0 or 6.0 powered device.

With SmartReg not only are you able to make registry modifications, but if it turns out you were wrong, there's a very useful undo feature which will restore your previous registry status. SmartReg will record all changes made in your registry. A good tool if you're paranoid about people messing up your current device.

SmartReg will let you undo and redo any changes made. You have a powerful Find/Find All feature. Besides that there's full cut, copy and paste for values and keys. There's also create, edit, rename and delete options. You can store frequently used keys in a favorites quick access list. If needed to import or export data you can do so in a Windows RegEdit format.

Dword values can be imported in decimal, hexadecimal or binary modes. You can change binary values with the binary editor. There's also an option of accessing Parent Key, Root Key, First Sibling and Last Sibling.

SmartReg 3.4 doesn't come free of charge. It costs $9.99 after 14 trial days but it's definitely worth it.