Banzai's Add-on for Blood:
Six all new levels a secret level and a bloodbath level too. Small download
(620k) Easy to get, easy to install not so easy to play... Hehehe. No
files replaced, removed or overwritten! I think it's worth a try, what do
you say?
http://www.pyramid.net/steveg/index.html
Enjoy,
Nailer