Trying To Build An Update Query

I've got a table that stores individuals, and their organization all in one table, with basic information about each (contactId, name, primary address, phone, etc.). There is also, for each line, a true/false field 'PerOrg' that lets me know if it's a person (true), or an organization (false); and a 'OrgKeyCode' field that has the contactId for the person organization.

I'm looking to make an update query that will make the primary address for all individuals set to the primary address for their corresponding organization. Here's my queries to find the items:

This gets all of the organization, their contactId and their primary Address (as long as they have one).

SELECT ContactID, FullName, PrimaryAddressType
FROM tblContactInformation
WHERE PrimaryAddressType IS NOT NULL AND PerOrg = '0'

This gets a list of all of the individuals that have an organization assigned.

SELECT ContactID, FullName, OrgKeyContactID, PrimaryAddressType
FROM tblContactInformation
WHERE PerOrg = '1' AND OrgKeyContactID IS NOT NULL

Now I need to create an update query that sets the Primary Address for individuals to the primary address for their corresponding organization. Here's what I've got worked out so far: (just the basics).

UPDATE tblContactInformation
SET PrimaryAddressType =
WHERE PerOrg = '1'

At issue is, I'm not sure how to pull the primary address only from the organization into the SET line. Do I need to save my first query, then somehow call it in my update query, where the contactID = the OrgKeyCode? Or something like that?