Combining PST Files Outlook - Version 3.1 If you want to combine Outlook 2003 and Outlook 2010 PST files in single unite then quickly download the PST merge software and combine it frequently. By using this utility you can remove the duplicate files in Outlook and search email files smoothly. For combining PST files Outlook 2003, 2007, 2010 and so on version with the assistance of PST merge file management application. This file management application allows you to combine lot of files into one file efficiently. This is one of the easiest solutions for combining PST files in Outlook 2010, 2007, 2003 etc. Just download trial version application knows more about PST merge application. With the trial version you can combine first three folders in each file. Now you can buy an application key for combining unlimited files in Outlook. Buy personal version of $69 and business version at $199. User can also contact with our customer support for combining PST files outlook.