There are currently four types of DSL....

dsl-<version>.iso: the standard isolinux version, which is used for liveCD, 
frugal, or traditional harddrive install.

dsl-<version>-syslinux.iso: boots using syslinux instead of isolinux, 
used for some very old hardware that is no longer supported by isolinux.  
Use syslinux version if booting fails with the standard iso.

dsl-<version>-embedded.zip: comes with qemu, for running inside of a host 
Windows or Linux system.

dsl-<version>-vmx.zip:  a virtual machine that will run in VMware or 
VMware player.

frugal_lite.sh is our network install script and requires tomsrtbt linux:
http://www.toms.net/rb/

Docs are located in the pdfdocs/ directory and in the DSL Wiki