Actually "simplest" way to make the groups (parts) in your skirt match those in the mayadoll is this way: 1. Activate only the layer with the mayadoll. 2. Hit "w" (be sure to be in "polygon mode") and select a part (for example the Hip). 3. Click on the "view tab" and click "hide unselected". Now the only visible polygons will be those belonging to the Hip part. 4. Activate the layer with your skirt and keep the layer with the mayadoll as a "background layer". 5. Select the polygons in your skirt that matches the area in your background layer (the Hip) 6. Click "view tab" click "create part" and select the same name as the part in the background layer (in this case "Hip"). 7. Click "unhide" and start all over again with your next group (part).