How do I add more pose slider to a specific group such as lip poses. I know how to make pose slider, but I don't know how to put them in a specific tab under pose slider window. I have a tab for mouth relationship, and I am trying to add another lip pose and have it come under the tab for mouth. The mouth tab is already made.

If you want to place a pose named "pose1" in a tab named "Pose Group" -
Right-click on the User Properties -label- in the Properties Panel.
Choose New Property > Folder
A new folder named "Folder1" will be created under User Properties.
Right-click on "Folder1" and choose "Rename", then type "Pose Group" for the name.
Place your mouse over the icon to the right of "pose1", it looks like a cross with arrows on all four arms.
Drag this icon and drop it on "Folder1".
If you expand the triangle that appears to the right of "Folder1", you should see "pose1" inside.
Now "pose1" will appear in a tab named "Pose Group" when you look in the Pose Slider window.

Thank you, that works!