If your talkin about configuration backup, just make sure you are not using those when upgrading your firmware... you should always manually reconfigure if changing Firmwares!!!
oh.. I had the cfe confused then. I havnt been into the router for a long while but recently I acquired a new one so I want to experiment more with DD-WRT.
so when you back up the configuration and then restore it on the same router and DD-WRT version your start up scripts will work on first re-boot. correct?