Ah, I see. This isn't possible, unfortunately. MediaShout 7 will only accept the content of the songs. Then, you would need to add a background and make your adjustments within MediaShout 7. I apologize about this.
When the Import a V6 Script feature is added, you will then have the ability to bring in a MediaShout 6 script and save your Lyric cue's to the cue's library. That will save the background and everything for next time you need this song.
I don't see an email from your in our inbox. But, what I have seen so far is that there is just one or two songs within the library that are causing the issue. If you can narrow it down and determine which songs are the problem, you can delete it and then import the rest with no issue.
When I did my troubleshooting, I would just take a part of the library (A-F, G-M, etc.). Then, if one doesn't import, I would narrow it down further and further until there are just a few songs.
I hope this is helpful!