Can I file IFR DIRECT with a non-WAAS GPS? The AIM 1-1-17 2 (a) states:


  Aircraft using un-augmented GPS (TSO-C129() or TSO-C196()) for
  navigation under IFR must be equipped with an alternate approved and
  operational means of navigation suitable for navigating the proposed
  route of flight. (Examples of alternate navigation equipment include
  VOR or DME/DME/IRU capability). Active monitoring of alternative
  navigation equipment is not required when RAIM is available for
  integrity monitoring. Active monitoring of an alternate means of
  navigation is required when the GPS RAIM capability is lost.


Does this mean that if I have a non-WAAS GPS unit then I have to file only along Victor airways or between VORs? Or can I file DIRECT?
This question was answered here on this Website.  Read the second answer.

Yes you can file direct even without a GPS.  However it would be advisable to perform a RAIM check during your pre-flight along your intended route and determine that you would be in RAIM during the route.  If for some reason your GPS loses RAIM capability then you should proceed using VOR/DME/ADF.  You can still fly direct with using only VORs although that will be more difficult.