ABCpdf 6 is a new version completely independent of the old. You can have both versions installed at the same time. When you want to take advantage of the new features simply reference the new name.

Simply replace...

Set d = Server.CreateObject("ABCpdf5.Doc")

with...

Set d = Server.CreateObject("ABCpdf6.Doc")

ABCpdf is fully backward compatible. Although extensive changes have been made to the core engine we check that these changes produce results that are compatible with previous versions.

Layout is very similar but a few layout issues have been addressed which means that the new - correct - layout may be slightly different from the old layout.