Replace the LOGO with my own one then using it commercially?

[ASGH]

Can I change the whole style of pfSense GUI and replace the LOGO with my own one and then use it commercially?
Is that permitted?
If, what is the restrictions?

[Metu69salemi]

start by using search first, this is asked earlier.
http://forum.pfsense.org/index.php?topic=53210.0