Notes isn't that important in guitarplaying, as long as
u know the scala good enough to know how the note sounds,
if it gonna fit in or not.. If u learn to play by notes,
this will take longer time.. still, u have to know the
root, and maybe the third(if it's a minor or major).
Some guitarist hear if it's a major or a minor chord,
but that's another story.
the guitar is an instrument played by positions.
a scala helps u to play 'right', but sometimes u can
leave the scala, and make it right anyway.

Anyway, i bet u know what notes the strings are open.
EADGHe. each fret is a half tone up.
the 12th fret is the same as the open string,
so it's really al the same one more time from the 12th
instead.
D-7-
A-0-
E-5-
this is the same note, only the note on the d string is an octave higher..

this is just a start.
learning to know the whole fretboard is painful, but
u have to start one place.. start with octaves over strings.
Try to see the system. Then it's easier to learn the rest.
it's really all about logic.

hmm.. isn't there any articles about sheetplaying on this site?
Maybe i'll write one when i got time.. = )