How do I setup a new VAT Posting Group pairing?
You need to go into the Administration tab on the Navigation Pane.  Then Application Setup, Financial Management, VAT Posting Group and Posting Setup.  Select the required VAT Business Posting Group and VAT Product Posting Group and then enter the relevant General Ledger account number.

How do I create a new Dimension?
You need to go into the Administration tab on the Navigation Pane.  Then Application Setup, Financial Management, Dimensions, Dimensions.  Enter the code and name for the new dimension, the remaining fields will automatically assigned.

     
Can I get support for old versions of Navision?
Yes Fraser Price Consulting support all versions of Navision from Navision Financials v2.x right through to the current version 2009 Classic and RTC.
We provide support either at a fixed price per month (based on number of users) or ad hoc. We provide a full range of Navision services from project and implementation management to developments and training.
More details are available from the List of Services link on the RHS.

Why upgrade to the lates version of Dynamics Nav?
This will always be a business cost / benefits decision but as long as your business has maintained the software maintenance fee each year, you are entitled to the latest software free of charge.
That's the good news! The bad news is that unless you have a dedicated Nav support operation within the business, migrating from the old to new version will require support from Nav consultants.
Then consideration will also need to be given to IT instrastructure enhancements required as a result of upgrading. If from Nav v5.x to 2009, there will be little additional requirement.