One... shot. (maybe more)
1) You've installed the game already. Good.
2) You've a folder on your hard disk named "planeshift crystal blue" usually located in c:\program files\planeshift crystal blue . Good.
3) Navigate to that folder and have it opened. That is you should see art, data... and lots of other folders. Keep the "planeshift crystal blue" folder at sight.
4) You've downloaded this file
http://66.111.255.12/~psmirror/015patch.zip somewhere on your hard drive. Good
5) Double click on that file (015patch.zip)
6) Select all files inside that archive, drag them and drop just inside the planeshift crystal blue folder that you had opened since point 3
7) Windows will ask if you want to overwrite the files. Say "yes".
8 ) No error messages should come out, neither in this process, nor in the game installation process.
9) At this point, you'd already be able to launch the game... but
10) Let's run updater program to have some fun.
11) It should have updated a couple of art thingies...
12) Launch the game. Try to enjoy.
wow...

12 bullets.