[CentOS] iproute create policy routes after reboot

Which files do I need to edit in order to initialize a route after a 
reboot.

I have a 802.1q tagged VLAN interface which I need to create a rule, and a 
route for.

I see on my CentOs 4.2 box that in /etc/iproute2 there are the following 
files. I realize that I can add my tables to /etc/iproute2/rt_tables, but 
when I want to create a rule I am not sure where to put the information 
for the next reboot.

[root at smtcormx01 ~ ]# ls -la /etc/iproute2/
total 104
drwxr-xr-x   2 root root  4096 Oct 28 13:44 .
drwxr-xr-x  87 root root 12288 Oct 28 21:47 ..
-rw-r--r--   1 root root   299 Feb 21  2005 rt_dsfield
-rw-r--r--   1 root root   286 Feb 21  2005 rt_dsfield.rt_config
-rw-r--r--   1 root root   296 Feb 21  2005 rt_protos
-rw-r--r--   1 root root   276 Feb 21  2005 rt_protos.rt_config
-rw-r--r--   1 root root   113 Feb 21  2005 rt_realms
-rw-r--r--   1 root root   112 Feb 21  2005 rt_realms.rt_config
-rw-r--r--   1 root root    98 Feb 21  2005 rt_scopes
-rw-r--r--   1 root root    92 Feb 21  2005 rt_scopes.rt_config
-rw-r--r--   1 root root    91 Feb 21  2005 rt_tables
-rw-r--r--   1 root root    87 Feb 21  2005 rt_tables.rt_config