Get the PoddoX software for your iPod, the free iTunes alternative
In the menu "Settings" PoddoX provides the opportunity to set an entry in the context menu of the Windows explorer
that let you copy files or folders to the iPod directly. The command "Copy to iPod" starts PoddoX and copies the selected files to your iPod.
PoddoX will search automatically folders for audio files and add them to the transfer list.
With the menu entry "Register to Explorer menu" the command can be set to the Windows explorer, click "Unregister" to remove it.
Advice: Take care that the file poddox.exe stays at the current path, e.g. C:\program files\PoddoX\poddox.exe. If this file has been moved, you have to remove the Explorer command by using "Unregister" and register it again with "Register to Explorer menu".