[stargate]

Hello all, I am having a problem and I'm hoping some expert here can give me some help.
I have converted many of my ebooks from pdf, rtf, txt format to mobi format using the mobi reader. The title and author metadata were almost always not correct and I opened the properties from inside the mobi reader for every file and corrected them. They all look good now on the mobi reader. However when I added the files to Calibre, in order to take advantage of its better cataloging features, the metadata shown have the original incorrect data. Can anyone suggest an easy way to embed the correct data in the files without resorting to editing each one in Calibre? I have used the MBP_reader program to examine the corresponding .mbp files and the correct data for title and author are shown in there. But how can I embed these in the mobi files?
Thanks