The problem is, "file is corrupted" i think that is pretty clear.
Try getting a sis/sisx from Nokia mosh that is designed for the n95 and install that. If you still get the error message than there may be an issue with your PC transferring over to your phone. Try a different method to get the file to your device. usb, bluetooth, memory card reader, SMS, download URL by wifi via device....
If you are still getting the error message, then try a soft reset of your phone. This can be found by searching the forums.
Rosa Parks is my idol for I too refuse to get up out of my seat.