Migrating rails

I have a problem with migrating to a new version of ruby on rail (outlined here: http://www.ieinn.net/ ).
There is a directive
how to do it, but since I do not speak ruby it is not accessible to me.
Could anyone recommend a web developer to me, who can fix this. Or -alternatively - edit that blog entry (by translating the instructions given in prose into code) so, that I can do it myself.