Shade
Monster Junkie
It is suggested that a normal vampire ascends to "greater" status after 999 years of unlife, with promotion to the next level after a similar period and so on. Except where noted otherwise a greater vampire should be treated as per MM1.
I get the impression that this is more like the evolved undead template, so it would only be applied a creature that already has the vampire template (and thus not need to repeat the vampire's abilities).
Although we currently have it lumped together as a single "greater vampire" template, I think it would be best to now break it up into the five unique templates.
Probably something like...
"Vampire lord" is an acquired template that can be added to any vampire that has existed for 999 years of unlife (referred to hereafter as the base creature). A vampire lord uses all the base creature's statistics and abilities except as noted here. This template does not alter the creature's type.
"Vampire arch-lord" is an acquired template that can be added to any vampire lord that has existed in that state for 999 years of unlife (referred to hereafter as the base creature). A vampire lord uses all the base creature's statistics and abilities except as noted here. This template does not alter the creature's type.
...and so on...
Too complicated?