Just for giggles, I opened up the 32bit version of PSPX6. Selected Preferences, File Locations, Plugins. I clicked on add and pointed the program to the Paintshop Pro X5 plugin directory and to my delight, all the plugins I had been used to using with X5 work in X6 32bit.
True, the 64bit allows to use full system resources when it comes to memory usage, but counter that with being able to use all the tools/plugins.
Plugins Compatible with Corel Paintshop Pro X6 Ultimate 32bit:
Alien Skin (all of them )
Athentech Imaging – Portrait Professional
ePaperPress PTLens Correction
Flaming Pear Plugins
Nik Software; Color Efex Pro 2 and 3, Viveza 1, Define 2, Silver Efex 1, Sharpener Pro 2.0, Sharpener Pro 3.0 (RAW), Sharpener Pro 3.0 (Output Sharpener.) Hoping that Nik/Google and Corel get together to make the more recent plugins compatible with Corel.
Richard Rosenman: DOF Pro and LensPro
Picture Code Noise Ninja