PC-BSD 9.0 doesn't boot with USB CDROM for LG model "one-touch"+ Acer T231H
The first problem sounds like the USB CD drive isn't showing up fast
enough. I've changed the wait time to 15 seconds, and also allow the
user to manually mount if they have a very slow device.
For the 2nd issue, it probably needs the newer snapshot with intel video
support. Checkout blog.pcbsd.org and try grabbing a newer snapshot to
test if the intel driver there works with your video.