What is the best way to change some of our accounts upon migration from GP to BC?

We are embarking on a migration from GP to BC. We have several companies. We may need to align some of the chart of accounts in a few companies. We will be using Excel templates to load the data. What is the best route to take for this change? Anyone BTDT? Looking for any advice, options and/or lessons learned. Is there a good resource, besides searching the this user group, for all things GP to BC migration?
TIA!

Angela

Hi,
You can use the GP BC migration tool which is free by Microsoft and if you want to only import the Chart of Accounts, then Config Package is best approach.
Thanks