"Why does the OS-9.2.2 screen collapse to half size during start-up?" için yanıtI tried using older system discs on a G3 iMac, and got the exact same behavior you are seeing. You need the install and/or restore discs that came with that specific iBook.
"Removing optical drive to reduce weight" için yanıtI have a question. Why didn't you just buy a MacBook Air? If it being lightweight was important to me and I didn't care about an optical drive, that's what I would do.