enterprise php application automated testing

Hello all, I know I can use simpletest to test my application at the class level but I need a tool to test it at a much higher level. I need something to enter data in forms, click links, etc. I have played some with simpletest's web tester without much luck. I am just curious how others are effectively testing their large php enterprise applications? Years ago I wrote Visual test scripts and it had a feature where I could record all my keystrokes as I entered, clicked, etc...I guess I am curious if there is anything like that..open source? Any suggestions are welcome. Thanks!