Option A Getting Started Guide
Option D with Control Center User Guide
Options D and O Spreadsheets User Guide
Microsoft Office is not used by either Option A or Option C, so you can install the current version of those programs without problems.
Option B currently requires at least Microsoft Excel 2000. There were significant changes in the VBA Macro language used by Excel between Excel 97 and Excel 2000 (and smaller changes between Excel 2000 and Excel 2003). We are no longer able to support use of Option B with Excel 97. (It might work. Many of the functions do work, but others will produce “Compile Error” messages.) As an alternative, you can use the Option D (“No Code”) workbooks.