I'm at a bit of a lost at the problem you're describing, so I'm not going to try answering it.
I just see you mentioning a 4G file limit, and will explain (what you may already know) about it.
If the FTP server is running on a machine with a Fat32 file system, it may fail to list the files or send them correctly.
If the drive you're trying to download to is on a Fat32 file system, the file will fail at 4G.
If you are using Win95/98/ME, then you are using a Fat32 file system. If you upgraded from these to 2K or XP, then you may be using Fat32.
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