Change to New Domain, carry Wks configs foward?

Inherited a customer with about 35 users running on an SBS2011 domain that is replete with old, outdated users & PCs, and likely some corrupted AD info. I would like to start the customer fresh with a new domain and rebuild the accounts and computers from scratch with a Windows 2012 server.

The problem is that some of the desktop user configurations are fairly complex with numerous custom application settings. We do not want to wipe out the PC user setup entirely. The programs at issue are not tied to domain privileges or other AD-specific properties. Most are locally configured and some have mapped network drives.

Relocating the network share data and re-mapping the drives will not be an issue. Our concern is the desktop application configurations for the domain user the reside locally on the workstations - some of which only exist from a legacy, discontinued vendor that would be difficult or impossible to recreate.

Is there a good / effective way carry forward the local user confirmation from the old domain to the same user in the newly created domain? Can we export and import. Copy all contents of the domain-old.user directory over into the domain-new.user directory on the selected PCs?

Please advise.