The issue is handling files larger than 2G .. not 4G. It occurs because long is 32 bits and after 2G you get unsigned numbers.

DVD images for download are not supported yet on most browsers.
Mozilla has a zillon bug reports on it.

Windows has an adhoc solution that goes to 4G but nothing beyond that.

Jiglo or other tools will be able to do it.

how do you use jiglo to download fedora core 2 dvd iso it's 4.3gb (i wget the file, and i got only 2gb and it errors out) ? :|

This link may be of use then. You will need to use one of the posted wget patches and compile from source, or just use Gentoo and feel smug.

http://bugs.gentoo.org/show_bug.cgi?id=30985

TIM

BitTorrent would of been able to do it too, maybe 'sid' should offer a torrent for the DVD Image :)

I think I know how to solve the problem. Here is the discription of GetRight download manager version 5.2 beta 1 and beta 2:
http://www.getright.com/beta52.html

The first improvment says that:
Fixes & Improvements in Beta 1:
Increase from 32 bit numbers (which maxes out at about 2GB for a single file) to 64 bits (which is about 8 billion Gigabytes). Should be good for another 1000 years or so!
TIP: How your disk is formatted can limit file sizes too. FAT limit is 2GB, FAT32 limit is 4GB, NTFS is unlimited. Info from Microsoft.

So I tried it and... it works! I've seen clear that the program have been downloading the file with the size of 4157 MB (Fedora Core 2 DVD ISO).