Need assistance with Pre-Processing Import Data

I am in need of assistance.  I am attempting to use Connector Solution to pull some data from an LDAP data source.  The data we are trying to pull is the lastlogon field.  I've never actually used Connector Solution in this manner...it has been used extensively in our environment to import .csv files, but never LDAP and never using the pre-processing.  On to my questions:

Question #1:

Is there a better way to pull this data into Altiris from AD?

Question #2:

In order for the lastLogon field to be useful, the formula contained in the following article needs to be used to convert the data into date/time.

http://www.excelforum.com/excel-programming-vba-macros/649446-converting-ad-field-lastlogon-to-date-and-time.html

I would prefer to do this on the way into the database so that I don't have to parse it in every report that I want to use the data in.

 Does anybody know how to do this?  Can you please help me?

Question #3:

Once the data has been converted into a usable format, how do I then import the data and associate it with the appropriate computer record?  I guess there needs to be a key that matches between the two records, but I'm not sure how to pull this from the LDAP source.  Once it gets pulled from the LDAP source, I assume I can just designate it as the lookup key in the import/export rule.