(Disclaimer: I work for a company which have a lot of experience in these kind of migrations and we have special tools for them.)
You need a mapping between the old (SharePoint) and new (LiveLink) paths of the documents.
A simple two-step migration process is the following:
- Copy the documents from SharePoint to LiveLink and fill the mapping table during the migration.
- The links in LiveLink could be
- changed to point to a dummy LiveLink node,
- left empty.
- The links in LiveLink could be
- Fix the broken links in LiveLink with the mapping table.