Why is the application button indicator on even after I properly shutdown my Lifebook C2330?

I intend to upgrade the hard disk on my LifeBook C-6572 to 48GB, product model: http://shop2.outpost.com/product/94318/. Can you tell me the thickness of the hard disk?

Where can I get the manual of LifeBook C-325? What is the latest BIOS for this model? What is the maximum memory for LifeBook C-325?

I wish to upgrade my RAM. I was wondering if the BIOS for my model is upgradeable to support more than just 256MB. I know other LifeBook models have this option by flushing the BIOS.

How can I configure the infrared port on my LifeBook C-6544 to transfer data? What is the port number of the infrared device and where can I update the driver?

Which memory chip speed, PC-100 or PC-133, is compatible with C-6560?