Custom Paintings

[ExpectedIdentifier]

A simpler way may be to just create a billboard and put it over the current painting.
-Open the material editor and create a new solid diffuse using your dds file
-Create a billboard and use the material you just created (change it to a FixedAxis type)
-Resize the billboard to fit the frame

If you don't know how to do this I can explain in more detail.
There are multiple ways around things when using the level editor