changing base url

hey, my rails app is viewed in a frame of another site.
My problem is that because of that all my links and redirects move my
site out of the frame and present the links on their own...I'll try to
explain better:

Lets say my domain is: www.ror.com
my home page is www.ror.com/home/index
but u should view it using: www.frames.com/myapp/home/index
(meaning my site should be viewed only through a frame in the www.frames.com
website)
from the home page u can move with a link to a different page:
lets say: link_to 'link' :action => 'show'
now when u press the link the browser will go to www.ror.com/home/show
but I want it to go to www.frames.com/myapp/home/show

In short I want to replace www.ror.com
to www.frames.com/myapp

hope I made it clear enough...
Thnx !