[NTLUG:Discuss] Humpty Dumpty Syndrome: split and cat on a 5 gig file

[Lenrek Xunil]

Ok. Sorry about the confusion.  There are three computers:

1.  The new one for person A (has SATA hard disk and no IDE interfaces)
2.  The old one from person A that's going to person B which will have
the same setup as #3 (IDE hard disk)
3.  A third one I used to image #2 (IDE hard disk)

The folders that were urgently needed I archived and have already
transferred to computer # 1.  Computer # 1 is already set up, except
for one application called ACS.

I already did a "dd" from computer #3 to computer # 2 yesterday using
the Gentoo CD.

None of the above is the issue.  

On the old one, #2, I used windows to create a backup of several
significant directories.  There was a proprietary database program on
there so I backed up folders that were related to it that were not
urgently needed, all to one file using the back-up tool that comes
with Windows.

My issue is unrelated to "dd" or transferring the file.  I already
executed the "dd" command, and I can take my router and cables to
transfer the 5 gig file to computer # 1 .

Would I do this now, I would never split the 5 gig file.  Yes, it was
unnecessary.  But as I said before, too late.  I split the file and
deleted the big one.  Now I need to put it back together.  But I am
getting an error message that says, "file limit exceeded".  Is a 5 gig
file too big to put back together?  Are the limits to how big a file
can be?  How can I put the file back together?   Thanks.