Hello Liz:

The current Adagio versions are almost exclusively version 8.1. You haven't mentioned your ACCPAC Plus versions or how you handle P/O's.

The following modules can be upgraded without affecting ACCPAC Plus because they are already exclusively in the Adagio world.
-Invoices
-Sales Analysis
-GridView
-Multicurrency
-Lanpaks

The following modules are compatible with ACCPAC Plus as follows:
-OE 8.1A [ACCPAC Plus 6.1B, 6.5A]
-IC 8.1A [ACCPAC Plus 6.5A]
-AR 8.1A [ACCPAC Plus 6.1A, 6.5A]
-AP 8.1A [ACCPAC Plus 6.1B, 6.5A]

General Ledger is now at version 9.0. It is NOT compatible with ACCPAC Plus GL. This is actually an advantage because it offers some really great features. Note that Ledger 9.0 will retrieve transactions from Adagio 8.0/8.1 and ACCPAC Plus subledgers.

Maybe someone else can answer the SuperClerk question.