Your best bet is to search the forums, and see what other members have found easiest when faced with the same problem, as you can imagine, your not the first member to have experienced this, and by no means the last.
To find out your N95's Firmware version, key *#0000# into your phones key pad. The V##.#.### shown is your handsets current Firmware! Please enter these details along with N95 model into your profile. This provided information will help other members help you, should you have any problems, or questions with regards to your N95. Thank you.!
Your best shot is to turn the phone upright from the screw and place pressure on the screw while turning, it "usually" shifts and then unscrews. Though if you feel even with pressure this fails with the smallest of turning, STOP!, you will strip the screw. That is what I had found on this forum, and it helps.
Linear Mode
