I've just uploaded L3DT Pro 2.5.0.36, which includes some improvements to the image drape feature. Now, you can semi-transparently overlay one map in the project over another. For example, here is a screenshot of the texture being draped over an RGB feature map such as those used for Spring, which allowed me to more accurately place the features where I wanted them:
The updated userguide is here.
Enjoy!
Cheers,
Aaron.
