The openbeta tries to use files that just don't exist... don't worry about messages saying file not found.
But some files can't be found because the game looks in the wrong folder.
Most of the ESF_Bot files need to be moved to be used.
Read the following thread to find out where the ESF_Bot files need to be moved to for the current Open Beta. (might be fixed in future release, you never know)
[thread]68234[/thread]
Oh, and the following files need to be swapped round (still), the files should be in the opposite folders:
esf_openbeta\sound\krillin\destructodisc_charge.wav (no gap between 'a' & 'v' if you can see it. [vBulletin bug?])
esf_openbeta\sound\weapon\destructodisc_charge.wav