I've been using IBM Rational Performance Tester (RPT) since it was the Prevue tool long ago. I've used it in many ways, outside of the box, so to speak, for things other than performance testing. One of those things is for monitoring, specifically for production monitoring to verify the target system(s) are up and running correctly. Currently I am involved in an engagement utilizing IBM's ITCAM (IBM Tivoli Composite Application Management) product. As part of its use, we are creating RPT tests (tests is the term used in RPT for automated scripts). For those who may use ITCAM in the future, here are a few up-front working tips. 

(1)  After creating tests in RPT, you upload them to ITCAM. ITCAM will only see tests located in the root directory of the project, so you must place the final working versions there.

(2) ITCAM will only see custom code located in the "src\test" directory, so make sure you keep them in this default location.

(3) ITCAM does not currently see additional Java classes you create and import into your custom code (i.e. utility/reusable functions). You can get around this by creating a new custom code file and adding it to the beginning of the test. Don't add any executable code to the "exec" function. Place all of your utility functions after the "exec" function. ITCAM will now upload the custom code and since it is located in the default "src\test" location, you do not need to "import" it into the other custom code you create.

I hope this helps some. If anyone has similar tips regarding RPT use in ITCAM, please feel free to share in the comments.