How to burn big .iso file into disks?

There may 3 way to solve this problem:

1.unpack the iso files into a folder, and then compress into several .iso files.

2.mount the iso onto a folder such as /mnt/oldiso, then use mkisofs or genisoimage command to remake two iso images.

3.copy the iso image into a windows system and use some tool (Neuro eg.)  to split the original file into two parts. Each part could be an independent image.