OK, I dont want to draw this out too much, but the RF modules (wireless RS232 data transievers actually) simply accept serial commands to change parameters (no fancy choices on how its done), which must be stored because they are preserved on power cycling. Other than my specific project, I bought it up because this is quite common on devices, commands to change stored values (baud rate etc) which are usefull to change on the fly, would be interesting if someone had some experience.
Im thinking perhaps these changes are only stored during powerdown some how, with its internal power supply brownout detector.