Hello
If you use Background? Remover under Xara Xtreme you have 2 ways for calling our plugin.
Fisrt:
1. Run Xara Xtreme.
2. Open an image.
3. Select 'Live effect tool' or Ctrl-F5
4. Run Backround Remover plug-in (press to button 'New' and select ImageSkill->Background Remover)

Mark object and background colors, Press Aplly.

6. If image has translucent areas use "defring zone brush", Press Apply and then OK

7. Open suitable background image
8. Copy it (Ctrl+V)
9. Switch to previous image using ?Windows? menu.
10. Paste? background image on the processed image
11. Put background image backward the processed image (Arrange->Move Backward(Ctrl+Shift+B)
12. Using Selector tool place the processed image on desirable place

13. IMPORTANT! Export the result to PNG format ('File ->Export') run export procedure, choose PNG format and set export parameters(Size etc).
Second way:
1. Run Xara Xtreme
2. Open an image
3. Run Xara Picture Editor ('Utilites->Xara Picture Editor')

4. Run the Background Remover using item 'PS Plug-ins'
5. Process the image.Press Aplly then OK.
6. IMPORTANT! Save the processed image in the PNG format with alpha. (Use "Save" item (Ctrl-S)).
7. Open saved image in Xara Xtreme as new image
I understand that these ways are not clear, but Xara Xtreme does not support transparency like other graphic hosts (Adobe PS, Corel(jasc) PSP ..). When you save processed image Xara does not save alpha channel for all cases.
Dmitry