Hi jatna,
I hope I'm understanding your question...you'd like PS to open the file with the bottom layer selected? If so, then:
I believe, but not 100% sure, that PS will always open the file with the layer in which the most recent action was performed. Not sure if there's a setting for changing that...but try this: select the layer you'd like to have active when the file is opened. Perform an action, say, Select>All, then deselect all. Close the file with the changes saved, open it again, and your preferred layer should be active.
I've never been concerned with this issue myself, so without consulting my books I can't really say if there's a setting to be changed. If I get some time later on I'll see what I can find.