@MAN0NA
There are 3 different methods to derive off of a pose and edit the pose's location within the diveration.
Method 1) Create an xaf file that transitions the pose nodes to a different location. (you can easily create an xaf this simple in notepad; single track xaf that targets the pose's bone ID) Then create a new action under the actions tab. Set the trigger word to stance.Idle and set the animation to the new xaf file. This is probably the most well known method and is the method most developers use.
Method 2) Create your own xsf file from scratch. You can use an xsf generator for this, and easily edit the xsf file in notepad. Under the config tab in create mode, set the skeleton file to the new xsf file. Make sure your bone names / action triggers match up.
Method 3) Rip the original product's xsf file. Use a decompiler on the xsf file. Then derive off of the original product and drop the decompiled version of the xsf file into the diveration's assets folder. Under the config tab in create mode, set the skeleton file to the new xsf file. Then open the new xsf file in notepad and edit the translation x, y, z values to move the poses around. (this is the method I personally prefer, but the software to do this runs around $26 in total)