[Therion] Degrees: minutes in centreline

Hello We have lots of old data that we are trying input to build up our area map. Lots of this data is in degrees and minutes. When dealing with co-ordinates (lat-long) 52:34:23.2 works as degrees:minutes:seconds. I cannot seem to be able to get this format to work for survey data, is there a way to use degrees:minutes, if not could it be added to the things to be implemented, it would save lots of spread sheet work converting it, and make checking back to the original data far easier for future users of the data thanks Andrew