forwarding old address to new automatically
 

we changed our address from www.forum.iransalamat.com
to www.iransalamat.com/forum

I want to forward old addresses ( as a sample)
http://forum.iransalamat.com/showthread.php?t=2743
to new addresses automatically
http://www.iransalamat.com/forum/showthread.php?t=2743

I want to be done automatillay by installing a program. can we do it?
changing 14000 topics one by one is realy hard.

my english is poor sorry