Wheeler
Removing the IFR and GPS/RNAV Appr waypoints from the database would severely limit the value of the unit as a backup to the TSO'd GPS.
The 296 does have a CDI function and my understanding is that the RAIM forcast available through NAIPS is substantially more accurate than the inbuilt RAIM prediction function of units like the 430, and supercedes the units RAIM prediction for an approach.
FTDK