You will need a PC running Windows95 or similar. The program is supplied as a self extracting file. Copy this (using Windows Explorer) to a suitable directory for the installation such as:
C:\Program Files\OxCal3
Don't try to install this on top of previous versions of OxCal as the new version is sufficiently different that this might cause problems.
Then extract the program by double clicking on the OCDxx.exe file.
A shortcut to OxCal.exe can be created in the normal way.
The new version can read all old input (.14i) files but has been designed to keep these separate from the temporary data files and program files. You should therefore copy any only input files to a suitable working directory such as:
C:\My Documents\OxCal3
All new input files should be saved here too.
N:\Program Files\OxCal3
With the input files being saved in a working directory which has read- write access - eg:
H:\OxCal3
When you first run the program in such a situation it would be worth saving a blank input file in this directory immediately by pressing the button. This will ensure that any datafiles produced are stored in the right place.