Char. LCD and 18F452 on 20 MHz not work

[mackrackit]

Yes mackrackit.

But PBP not compile 18f452 to hex, MPASM compiling to hex. And MPASM compiling on (default) 4 MHz only.

MPASM is required for 18s.
How do you know it is doing 4 MHz? Did you change the congig (*.inc) to HS?