Take a look at my other video "My Workspace in Photoshop CS4 for Architectural Renderings" where I talk about the actions palette. The commands that get recorded in the texture action are: open file (where you texture is), select your texture, copy, (switch to the file where your rendering is), paste into (your selection).
Alex, I have never considered using grass brush as a stamp tool to paint in the grass texture edges. I have instead used the grass brush with two shades of green to do that but using it as a stamp tool works much better. Thanks so much for this tip.
Thanks for your nice comment. There is so much interest out there on how to produce renderings in Photoshop that simulate traditional media like watercolor.
I just posted the link to my actions file in the video's description.
I have been producing architectural renderings full time since 2001.
This video was intended for people that attended my workshop just so they could go back and see the slides again. I have some other videos that are actual tutorials and I will be making more soon.
I will be doing tutorials on the watercolor technique very soon.