Needed Microsoft Outlook PST Archieve Merger

Hey Guys hope you all doing well…. just wanted to ask if anyone has PST File merger for Microsoft Outlook which can merge several PST files like this website is offering
http://www.pstmerge.com
Please Help….
Answer #1
Open the current PST File
Then in Outlook / File / Open / Outlook Data File
Now you will have both open in Outlook. Basically you can now drag and copy only those items you want from the old to the new. It’s pretty easy with E-Mails and Contacts.
Answer #2
i tried….but the archieve from which i copied still shows size of 1gb in folder.