i can only give you a link to a tool in german language... http://www.slackiller.com/hlprograms/spritemage.zip
the options are as follows:
verhalten des sprites= sprite behavior
* parallel upright: sprite spins on the x axis but is locked on y and z.
* facing upright: when getting closer to sprite it turns away from the player
* parralel: default mode, sprite always faces the player
* oriented: the sprite is locked on every axis and is thereby static and does not rotate around as you move.
datei= file
ändern= apply changes
ende = end/cancel