how to prevent vuescan ffrom doing color correcting

hi,

A)
if set color balance to `none', does it mean that vuescan will not do
any color correcting?

B)
i am also thinking of directly output raw image from vuescan and
manipulate anything else in photoshop, is it a good method?

C)
i also want to ask when output to raw file, does the `lock exposure'
still take effect?

thanks.

-
woody