I'm trying to save the settings of Wyrmmaster's Millenium Deformers. These are stored in the parameters of props. But these settings don't get stored when adding a pose to the library... So how do i save these to pose files?

When saving poses, use the "Select Subset" button.
You can then select the magnet parameters you want to save (as there all deselected by default).
(De)selecting a "Figure" box will (de)select everything, so depending on which parameters you want to save, you can start with everything (de)selected.
Alternatively use a text editor to remove the body part keys.

If you're planning on distributing the poses then it would be a good idea to contact Wyrmmaster to check exactly what it is permissable to have in the files (this information may have been on his website, but the index page says it's under construction).

Well, even if i select the whole universe, it doesn't save the magnet parameters, as the magnet parameters that are set via the remote props don't get stored with the props (only the rotation and translation parameters).

Sorry for the wrong info, it appears those channels only get saved when you save a figure.
Your best bet is to contact Wyrmmaster for more information.

Thanks anyway. I "solved" that problem by writing a little tool that creates pz2 from the parameter setting you can copy to the clipboard ;-)

"... a little tool that creates pz2 ..."
A Python script or something else ?

Wish i'd know enough about python. I'm just pasting the parameter dial values poser copies to the clipboard to a simple java application which then writes a pose file.+#mn

The best way to save settings for any of my 2005/mil deformer sets is to use DAZ's Injection Pose Builder. Save the character with the dial settings you want as a "CR2" file (character library). Open the file in DAZ INJpose Builder (latest version) and make to select all the deformers and props (nothing else). It should look something like the picture below. The Injection pose builder will strip the deformers out and only save the morph dial settings. Thats how a make MAG files. These files are copywrite free and safe to distribute (as long as you make changes, don't just copy my settings). You can even make and sell poses for my deformers just like you can make and sell poses for any other product. However, you cannot distro the magnets or cr2 files themselves.

Thanks for explaining how to do this properly.