Asterisk Tweaks

Hi, I have an existing asterisk server that I need to have customized. I have multiple clients on this server but one client needs to have customization done on his SIP trunk to interface it properly with his Panasonic PBX. It needs to require a 9 before dialing a number and it needs to support flash for call transfer. Also, I would like a little bit of investigative work done on some one way audio events that happens randomly. I'm anticipating about five hours of work between all of this. Thanks, MD