No problem.
As for fixed distance for NDB range within flight plans, all IFPS is doing is applying the details of RAD, Appendix 4, which is available on the Eurocontrol website:
http://www.cfmu.eurocontrol.int/rad/index.htm
Basically, each FIR defines whether or not it allows any DCT routings in that airspace, and if it does, how long they are, in nm. The appendix also lists 'allowed' DCTs, which are and DCT routings that don't comply with these defined distance DCTs, but may be flight planned anyway. IFPS doesn't do any other DCT checking that compliance with RAD appendix 4, so from that perspective, that's all you need to worry about
