https://www.dotnetzone.gr:443/cs/blogs/birbilis/archive/2009/10/28/multiple-powerpoint-presentations-concatenation-using-vbscript-windows-script-host.aspxMy Microsoft PowerPoint presentations concatenation script, called PPTmerge , from the tranXform free transformations software collection has been updated to make the concatenation process less error-prone. Copying its usage instructions here: Place theelCommunityServer 2.1 SP3 (Build: 20423.1)