There is another thread just below mine from another newbie who describes his install as involving floppy disks before being able to use the iso images and this is from the slackware site
there is no mention on the site of how to install directly from the cd's)
Creating The Boot Disk
Once you have selected a boot disk image file from the list below, you will need to create the disk. If you are creating the image from a Linux system, the following command should work just fine:
dd if=[image file name] of=/dev/fd0
You may need to change /dev/fd0 depending on your configuration. If you are creating the image from a DOS system, the included program RAWRITE will help you make the disk. Here is the syntax for RAWRITE:
C:\>RAWRITE [image file name] [destination drive letter]:
For example, if I wanted to make a boot disk from the net.i image on a DOS system with the floppy drive as A:, I would use the following command.
C:\>RAWRITE bare.i a:
You should now have a working boot disk to use during the Slackware Linux installation.
The Image Files
IDE bootdisks (.i suffix)
bare.i This is the disk to use for installation on most IDE based PCs, with support for nearly all IDE controllers and support for IDE/ATAPI CD-ROM/DVD drives. Most CD-ROM drives made today fall into this category.
bareacpi.i This is similar to the bare.i bootdisk, but the kernel also contains support for ACPI (Advanced Configuration and Power Interface). If you aren't using a laptop, then you probably will not need ACPI (or APM) support.