Exporting Contacts and Accounts and putting back into Leads module

Exporting Contacts and Accounts and putting back into Leads module

We have been using Zoho for a few years and no one has really used the leads module until I arrived. Now I am in the process of wanting to move all of the leads that have been historically entered in as contacts and accounts back into the leads module. I have purchased the $10 backup export so I have all of the data and I am confident in being able to get all of the account/company and contact information into one line item for import. The only issue I am seeing is the ability to import the associated notes with these contacts. In over 1/2 of the leads we have more than 1 note associated so I can't just easily find the one to one relation ship and make the connection. I have seen something about being able to import the notes after importing the leads, but I am not sure on how I would be able to make the association upon import since the cross reference number will be different from the Zoho ID I exported to start the process. Any thoughts on the best way to tackle this issue so I can keep the notes associated properly?