How to Use Reusable Automated Scripts

I want to be able to create an automated test case using a reusable test script.  So let's say I have 3 test cases where the Login and Create new Item steps are all the same(just different input values) and from there each test case does something different.  How do I link them all together to run as one test?  I don't want to recopy the same code in to all the tests, mostly so I can easily maintain the code.

Currently I've created a stand alone automated test for the Login step

I've also created a stand alone automated test for the CreateItem step.

If I link the tests under the "Test Steps" section of the test case, they are ignored when I go to run the test as automated. I'm trying to avoid adding all the tests under a Test Set, since technically they all are a part of one test and I only want one pass/fail status for the entire test.

Is there any way to do this?

I'm using UFT 12.02 and SpiraTeam v5.2