Is a complex enough if everyone try to explain how to use ridge regression in a forum post. In fact you need the following files:
1. ridge regression.sps --> you can find in the same folder were you install SPSS (usually under samples directory)
2. you need to write your own syntax file. It's quite easy, that is a text file with these lines

INCLUDE 'Ridge regression.sps'.
    RIDGEREG DEP="Your depenedent variable" (e.g gpa) /ENTER = "Your independent variables" (e.g greq to ar)
    /START=0 /STOP=1 /INC=0.05.

give the above file a name. (e.g ridge1)

3. The spss file (.sav) with your data

All of these in the same folder. Preferably in the folder where is the Ridge regression.sps

Open in syntax your  file (ridge1.sps) and run.

If you want to see a detailed example look at here

http://www.coe.fau.edu/faculty/m ... ed%20Syntax%20Files

hope it helps

and this i found randomly from the forum

https://bbs.pinggu.org/thread-1533005-1-1.html

这个我也下过，不过好像只有1页，内容很少。