Ooh. With PS7 it comes with a grass brush.
Possibly you could search for a grass brush and install it onto your Photoshop.
I can't really think of a decent way to create grass elsewise, unless you want to use the pentool to draw the
grass.
What you basically do is manoeuver the pentool and fill in your grass like filling in a rectangle- the only difference
is that you're drawing the outline of the grass and filling that in ;)
I'll update this post in a moment with some pentool links. My internet browser needs to reboot.
merged: 08-08-2006 ~ 06:59pm
Here we are:
http://www.imanimetions.net/tutorial/tutorial.php?view=pentut
http://www.vectorage.com/tutorials.php
http://www.heathrowe.com/tuts/vector.asp
Hopefully it should trigger a few more possibilies :)