Not sure how handy this will be, but I modified a different exe I had worked on previously to allow one to add ROMs easily to the save list. Various save types can be found on scorpei's wiki and in offlinelist, and in some cases with the dumper app. Otherwise it is mostly trial and error.
It's a drag and drop app, you drop your ROM's on the exe and go through each one to either add it to the list or modify the entry if it already exists. Don't worry about the src.zip in the package, it isn't necissary unless you want to modify it (compiled with msys/mingw on a windows box).
It should be pretty solid, aside from the fact the number of files you can drop at once is limited by the combined lengths of the file names. I can do 20 or so at a time with really long names.