importing songs from hard drive

[eldaiquiri]

I just finished importing all about 7000 songs from my hd. I renamed all of them (artist - title) and put them into two files (english karaoke) and (spanish karaoke) . I then used a batch index them. I have since added a few more songs without a problem, but last night when I tried to add more songs I saw that when click add files, in single mode not batch, it adds not only the new files but all of the previously imported ones ass well. I don't want to index them because I have already printed a book and this would cause the numbers to change. Wen I printed the book a zeroed the new songs list. Is there a way That I can just import the new songs that I have added to my collection? What am I doing wrong? Which is better? kma or kmh? I used kma. Thank you