In these two classes:
com.dotmarketing.services.ContentletMapServices
com.dotmarketing.services.ContentletServices

These are the variables we have for a file and image:

FILE
FileInode
FileIdentifier
FileFriendlyName
FileExtension
FileURI
FileTitle

IMAGE
ImageInode
ImageIdentifier
ImageWidth
ImageHeight
ImageExtension
ImageURI
ImageTitle
ImageFriendlyName

It would be nice to have two additional fields for each one:

FILE
FilePath: This should have the entire path to the file: /myfolder/myfile.doc
FileName: This should have the filename: myfile.doc

IMAGE
ImagePath: This should have the entire path to the file: /myfolder/myfile.jpg
ImageName: This should have the filename: myfile.jpg