Screen Personas 2.0 SP02 - Session Timeout

Hi,

I have 2 questions here.

1. Is it possible to disable Session timeout in Screen Personas or atleast lengthen the timeout value? While creating flavors it is difficult to keep track of when the last changes were saved.
2. And, while recording a script I encountered a session timeout when I use the popup search boxes for searching. For example, in the transaction me33k, I try to find the contract by pressing F4 in the Agreement field. This opens a search popup. In the popup I find the Vendor field and press F4 again to display the popup search for Vendor. (Attached an image file of the exact operation in SAP GUI). This operation however is not working in Personas. I do not think this is a Personas issue, but may be something related to the configuration of Personas. Any help is appreciated. I have attached the log file as well.