mkisofs and large files

[RW]

I've been trying to burn a single large file (a 4.2 GB encrypted gbde 
filesystem within a file) to a DVD, but mkisofs tells me the file is too 
large. 

I looked on Google and found that mkisofs had a filesize  limit of 2 GB, but 
this was increased to 4 GB, so I dropped the filesize to 4095 MB, but it 
still failed, so I guess the version in ports still has the 2 GB limits.

Does the development version of cdrtools in ports have the 4 GB limit? If so, 
how can  I get sysutils/dvd+rw-tools to use the newer version, is it just a 
matter of deinstalling them both and  changing the dependence in 
pkgtools.conf?