Macro to automatically fill in a sheet form multiple workbooks

I have people going around the UK to calibrate some equipment every April and October and fill out a form in a workbook. When they come back they put the workbook into a directory relevant to that month on a shared drive and I want to put a sheet in the shared drive that automatically fills in important data form the forms into rows on relevant tabs ie April 2012, October 2012, April 2013 etc etc

Ideally the workbook will have multiple tabs in it, one for each calibration month. Is this possible to do with macros? At the moment i'm doing it with formulae and I've never tried using macros before, currently the formulae i'm using is ='Q:\[Barnsley_Gawber_Apr_2013.xls]NAHN Audit sheet'!$C$5 and I have to manually write these!