Couple of things:
1) This may not be related, but CFMX has some problems with RH 7.3. I don't know if they are install or runtime problems. I know it works with RH 7.2, so if you have that, you can avoid potential problems.
2) If you have a separate machine and the necessary hardware/software (network, IP connection, etc). you can use either NFS or FTP to transfer between the Linux box and the Mac. You don't really need to compress/decompress the files -- it just makes the transfer faster and cleaner for the dropbox technique I used in the article. The important thing is to replicate the Linux directory tree on the OS X system.
3) I always got the "gnutar: error exist delayed from previous errors." error message. I originally had an image of the Terminal window (with the error) in the article -- when I deleted it, I should have mentioned the error.
I just did a gnutar (Jaguar) and here are the bottom lines:
gnutar: Error exit delayed from previous errors
[TiBook:/volumes/FireWire 160 GB] cfmx%
Hope this helps