i have alot of cds at home and i want to download a version to test but i don't want to install from 3 cds which of these do i need?

01/03/2009 12:22AM 37,826,560 7.1-RELEASE-i386-bootonly.iso
01/03/2009 12:22AM 578,529,280 7.1-RELEASE-i386-disc1.iso
01/03/2009 12:21AM 556,648,448 7.1-RELEASE-i386-disc2.iso
01/03/2009 12:20AM 611,702,784 7.1-RELEASE-i386-disc3.iso
01/03/2009 12:19AM 301,914,112 7.1-RELEASE-i386-docs.iso
01/03/2009 12:19AM 1,895,702,133 7.1-RELEASE-i386-dvd1.iso.gz
01/03/2009 12:15AM 231,577,600 7.1-RELEASE-i386-livefs.iso
01/03/2009 12:15AM 478 CHECKSUM.MD5
01/03/2009 12:15AM 723 CHECKSUM.SHA256