Getting ROM file under 64K

[wootty2000]

The DHCP server is a Cisco Catalist 6500 switch and I dont think I will get access to it.

If I remove the menu and HTTP but include TFTP, can I still use a script to pull a full feature version? That might be an option

I have removed the original FLASH ROM and the A16 address pin is electrically connected to the controller IC, so Im hoping I still have a chance of using a larger ROM.
Do I need to pad out a > 64K with ZEROs at the end to make it up to 128K or can I just leave the unused space on the ROM as FF?