is very little information, the which samples...
but I think this is the solution...
add in the code of "SkinInfo.xml" of the Image
this
xml code:
<Picture Id="4300">
<File>Images/4300.png</File>
<Metadata>
<Colorize>false</Colorize>
<UMLeft>1</UMLeft>
<UMTop>1</UMTop>
<UMRight>1</UMRight>
<UMBottom>1</UMBottom>
</Metadata>
</Picture>
the codes "<Metadata>" are to set the image.