For info I downloaded the Beta3_Beta4 deltas via BitTorrent and applied them to the Beta3 iso images using applydeltaiso. Beta4-CD1.iso sucessfully re-created, md5sum: 7e3d75d6d397023bf6e7c44fc193b7fd Beta4-CD2.iso sucessfully re-created, md5sum: 1577d4934f17d387217aaa0dae986787 Beta4-CD3.iso sucessfully re-created, md5sum: e9b2f0ef523d3286152913513a7e5715 Beta4-CD4.iso sucessfully re-created, md5sum: 7fcdf998fc3d23d533f77ed73b15c6f8 Beta4-CD5.iso sucessfully re-created, md5sum: 21782a1c749cc95a20c2acb0ef32143c Here are the resulting MD5SUMs of the newly created Beta4 CDs... 7e3d75d6d397023bf6e7c44fc193b7fd SUSE-10.0-CD-OSS-i386-Beta4-CD1.iso 1577d4934f17d387217aaa0dae986787 SUSE-10.0-CD-OSS-i386-Beta4-CD2.iso e9b2f0ef523d3286152913513a7e5715 SUSE-10.0-CD-OSS-i386-Beta4-CD3.iso 7fcdf998fc3d23d533f77ed73b15c6f8 SUSE-10.0-CD-OSS-i386-Beta4-CD4.iso 21782a1c749cc95a20c2acb0ef32143c SUSE-10.0-CD-OSS-i386-Beta4-CD5.iso