This is probably not the best solution, but if you are in patched open mode then you can add your commands to /etc/init.d/rcS.

In protected mode using inception you'd need to update refhashlist or aegis will lock the file and malf your phone so I don't recommend trying that unless you know what you are doing.

Also if you are in patched open mode you might investigate doing your own startup script in /etc/init.d (i suppose it's not allowed in normal mode, correct me if I'm wrong.)