[ddouglass]

If you convert them in Songverter to KMA they will convert but no BookID will be assigned. This is why Hoster says you have duplicates after the Rebuild. Hoster does not know where to put them.
Additionally by converting them this way it does not convert correctly for the current Hoster.
The reason Hoster is taking so much time is because it has to extract the MP3 and CDG files inside, then import them. The reason this is done is to eliminate the slowdown when playing zip files. That slowdown is because to play a zipped file, Hoster must first extract the files and then play them. To eliminate this and speed up play Hoster does the extraction during import.
By converting them in Songverter first you are defeating this attempt to make Hoster faster and more efficient because Hoster will have to do the extraction each time that KMA file is played. If you want to use Songverter to speed up the Hoster import process then use it to convert from ZIP to MP3+G. Then import them and it will go much faster.