1. I'd try contacting Native Instruments for a Kontakt Player 4 installer, or maybe see if you can receive further assistance from Tapspace by submitting a support ticket there.
3. VDL Template 5.2.5 supports library version 2.5.1. VDL Template 6.0b supports library version 2.5.2. Aside from more instruments being defined in the 6.0b template for the 2.5.2 library, there are alternate mappings for snarelines, input maps (similar to the keymaps, but customized for use with the template within Sibelius) with input variables (additional writing options for various sounds).
2, If you're using and otherwise getting by with the 5.2.5 template, you can probably go ahead and wait until the 7.0 version has been completed. Both of the currently available VDL templates will work in Sib 7.
Let us know if you still have a question.
3. VDL Template 5.2.5 supports library version 2.5.1. VDL Template 6.0b supports library version 2.5.2. Aside from more instruments being defined in the 6.0b template for the 2.5.2 library, there are alternate mappings for snarelines, input maps (similar to the keymaps, but customized for use with the template within Sibelius) with input variables (additional writing options for various sounds).
2, If you're using and otherwise getting by with the 5.2.5 template, you can probably go ahead and wait until the 7.0 version has been completed. Both of the currently available VDL templates will work in Sib 7.
Let us know if you still have a question.