it could also be your copy of nero. I was able to burn ISOs larger that 2 GIG to disk with no problem. If I were you, I'd download a demo version of nero, and see if that works.
Still weak, I know, but getting better:
CPU: AMD AthlonXP 2500+
1.8GHz @ 333 FSB
512 DDR 2700
160 GB westerndigital hd
Dual booted with XP/Fedora Core 5
PCchips M848A mobo
nVIDIA GeForce MX 4000 video Card
Associate\'s Degree in Applied Computer Sciences.
A+ Certified for Hardware and Operating Systems. Network+ Certified