We do have mainframe application, we are considering Certify at this point. We have presently winrunner.
How good is this tool for having a combination of manual and automated tests?
Could we automate complex test scenarios.
Is it possible to set up some standards in automated scripts?
What type of automation are you doing?
Certify is an effective tool for manual testing as well as automated testing. It is even possible to establish data driven scripts so that you can drive both types of tests from a common source. I have used it for multi-screen scenarios by using a driver file that essentially walks the scripts through the process, and separate data files that provide alternative test values for specific test scenarios. I developed standard driver scripts to invoke specific functional scripts based on what was contained in the driver file, and it used one key variable to redirect the actions towards the manual prompting side or towards the automated execution side. It also produced Excel-based test scripts for manual testing backup (so the users could actually read the scripts and approve). It is probably possible to do this in other tools, but with the keyword driven architecture Certify makes it really easy to do.
Actually, I had an extended dialog on how to use Certify, but for some reason the Certify forum section has suddenly disappeared. When it returns you should check there too.