DreamHost PS Custom mod_fcgid QuestionsW

When my Apache config is built, I end up with these settings.

IdleScanInterval 30 IdleTimeout 300 ## the overhead for spawning a new fcgid process is pretty minimal (at least for PHP where I've tested it) ## setting this to 0 could potentially save a lot of memory after a while FcgidMinProcessesPerClass 0 FcgidMaxProcessesPerClass 20 FcgidInitialEnv RAILS_ENV production FcgidMaxRequestsPerProcess 500 FcgidConnectTimeout 10 FcgidIOTimeout 120 FcgidBusyTimeout 300 FcgidProcessTableFile /usr/local/dh/apache2/logs/apache2-ps80714/fcgid_shm FcgidMaxRequestLen 104857600

How can I change these in a way that stick when I make domain change?