The Jumpstart setup described here, is logically split into following categories. Other Jumpstart implementations may have different logical structure.

media - most space-consuming and least frequently changed component. Contains Solaris packages and patches, OEM software, site-built packages.

root - the copy of cdrom/Tools/Boot diskless client root image, with number of modifications and extentions. See Extentions section for more details

config - most frequently changing part of Jumpstart. Contains jumpstart rules (we intend to keep only one rule forever), begin/finish scripts, host profiles, miscelaneous scripts.