THE CHANGES IN THE ABOVE POST ARE INCOMPLETE!!!

If you make those modifications, you need to change all of the custom character declarations. Otherwise, the other styles will not work properly. Here are the other modifications (shown with the first set for context):

Code:
; --- lines Style custom chars ----
CharsetLines:
    LCDOut $FE,$48,REP $15\8                  ; Custom char 0 - 3 lines  |||
    LCDOut $FE,$50,REP $14\8                  ; Custom char 1 - 2 lines  ||
    LCDOut $FE,$58,REP $10\8                  ; Custom char 2 - 1 line   |
RETURN

; --- boxed Style custom chars ----
CharsetBoxed:
    LCDOut $FE,$48,$1F,REP $15\6,$1F          ; III
    LCDOut $FE,$50,$1C,REP $14\6,$1C          ; II
    LCDOut $FE,$58,REP $10\8                  ; I
RETURN

; --- blocks Style custom chars ----
CharsetBlocks:
    LCDOut $FE,$48,REP $1F\8
    LCDOut $FE,$50,REP $1C\8
    LCDOut $FE,$58,REP $10\8
RETURN