Created a custom module called Properties (replaces Accounts module)

Created a custom module called Homeowners (replaces Contacts module)

I can create a custom module for Potentials if necessary but the default one is fine for our purposes if we can continue to use it.

Now, when I convert a Lead I want it to map fields to these 2 (or 3) custom modules instead of the old ones.

Can I use the existing Leads module to do this or would I have to create a custom Leads module?

Either way, how do I go about mapping the fields to the new modules?

Thanks,

Ron