I can access the HDD, and I can copy/cut/paste files, until I reach some place in the HDD (I think around the 60GB mark), and I there are also bad sectors at other places.
HDD Regenerator didn't help me. Is there anyway I can fix the HDD?
Spinrite did wonders for me, there's a video on that page that goes into it really well.
Basically what it does as I understand it, is it goes through and marks the bad sectors as bad and moves the files that are there to good locations on the drive and then prevents the drive from writing to those bad locations in the future.