Increasing the saturation of a video?

[themostestultimategenius]

Hi,
The video is practically black and white. The Levels function/filter doesn't seem to help much but increasing the saturation does.
Used FFDShow to get the following results with Levels and Picture Properties.
Is there any internal filter for AviSynth to increase the saturation or do I need some other filter for it? If I do would you mind directing me to it please? :thanks:

Original
http://img516.imageshack.us/img516/4776/originaljs0.png

Levels
http://img124.imageshack.us/img124/5922/levelsln2.png

Levels + Picture Properties (Saturation 120)
http://img161.imageshack.us/img161/4804/levelsandpicturepropertrw9.png

Here's my script if it will help.
MPEG2Source("C:\Documents and Settings\Matthew\Desktop\Encode\[2001.09.29]BoA - ID; PeaceB + Sara + Don't Start Now (KMTV Show Music Tank KM Special)\[2001.09.29]BoA - ID; PeaceB + Sara + Don't Start Now (KMTV Show Music Tank KM Special).d2v")
tomsmocomp(-1,1,1)
levels(30,1,220,0,255)
# How do I add saturation in here?
awarpsharp(15,1,0.35,0)
gradfun2db(2)

[Guest]

Tweak(sat=??)

[themostestultimategenius]

Thanks. Now the video looks like it has life in it again. Haha.

The result.
http://xs215.xs.to/xs215/07214/Copyofresultffdfytrko.PNG