Hey, I had the same problem. I had originally unzipped the download on my local machine and then uploaded all the files. Here and there my ftp crashed or connection dropped. I went back and made sure all the files got uploaded, but for some reason I was getting stuck in the same place as you mentioned. So then I tried this, and it worked:
“upload the tar.gz file directly to your server and use SSH to browse to that directory and un-tar it:
tar -xzvf magento.tar.gz
Beats uploading all the files individually via FTP and helps ensure original directory structure and consistency. “
I don’t know enough to say if this will work for everyone, but it worked for me so I thought I would share.