I'll have a go then.
In each of your 2006 main folders you'll find a sub folder called local.
This has all your content, downloaded and modified.
You want to start with your oldest one first (logic being this has the least modified assets in) transfering this to the cmp of the new install.
Continue in date order until complete.
Starting with the oldest first will let you confidently when asked overwrite files of assets.
Probably as clear as freshly stirred mud to you but I've read it and it makes sense here.