Version 4.0 is not released yet.

For current version 3.02 look here
http://www.spellholdstudios.net/ie/pst-fixpack

but it is not available at the moment because they are upgrading the forum

Here, I uploaded the files from my archive

fixpack
http://www.filefactory.com/file/a161…pack_v3.02.rar

tweakpack
http://www.filefactory.com/file/a161…Pack_v3.51.rar

Unfinished Business
http://www.filefactory.com/file/a161…ness_v3_02_rar