Enhanced LiquidCrystal

Well I would like to do a bar graph on my 40x4 but it seems very slow at refreshing. When I write one character over another it is visibly taking a long time. Any ways of speeding it up?

I did see something on fast refresh on LCDs some time ago but I can't for the life of me find it. Anyone else know where it is?
[edit]I can't have been looking very hard before, here it is:
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1264215873/0[/edit]

Mowcius