Several people have mentioned it is OK to file or request direct and use pilotage. People, remember that we are talking about an IFR flight plan, which assumes you will have no problem navigating your route in total IMC!!!! Man, if you people can navigate by pilotage from the inside of clouds, you guys must be some pilots!You don't have to have a /R or /G to go direct. All you have to say is "request direct XXX" ATC doesn't care - it probably helps them out. The issue is the legality - don't say "GPS direct" or "RNAV Direct" just "Direct". Claim pilotage or DR.