This is from the PBP manual
Code:
Command Operation
$FE, 1 Clear display
$FE, 2 Return home
$FE, $0C Cursor off
$FE, $0E Underline cursor on
$FE, $0F Blinking cursor on
$FE, $10 Move cursor left one position
$FE, $14 Move cursor right one position
$FE, $80 Move cursor to beginning of first line
$FE, $C0 Move cursor to beginning of second line
$FE, $94 Move cursor to beginning of third line
$FE, $D4 Move cursor to beginning of fourth line
$FE is the same as Ins CON 254

Make sure you have the DEFINES like the manual has with the exception of
Code:
‘ Set number of lines on LCD
DEFINE LCD_LINES 2
Change to 4

And follow the schematic, POT and all (several seem to not use the pot and wonder why it will not work, some LCDs will not require it, but when in doubt...)