hi i had the same problems
here are a few tips that may help
dont try to import too many products at once no more than 150 at a time
dont import photos, meta data, mets description at the same time make a new csv file and add later
if you have field with no data make sure you click from the drop down that there is nothing to add. i cant remember the exact bit but its the top one of the drop down
always skip 1 row
try 10 or so the first time, photo is the big one add later
failing all this advertise on elance or people per hour offer a tenner to get some help you will get plenty of offers