> the higher level tools aren't ready for prime time.

Many hundreds if not thousands of PICBasic users would probably take issue with that statement. My royalty cheques are a reminder that PICBasic works real well. A little time getting to know the product properly will be beneficial.

> but changing DEFINE OSC 12 to DEFINE OSC 11 (actual clock is 11.0592 MHz) results in 8 assembler errors

DEFINE OSC 11 is an illegal setting. I refer you to my previous statement of getting toknow the product.

> The datasheet calls out many configuration bit switches that are not addressed in the .inc file.

For 18F series PICs you will be using MPASM Assembler and not the PM Assembler. You need to locate the appropriate INC file located with MPASM. All the valid Configuration Fuse defines will be located theirin which can be cross-referenced with the PICs Datasheet.