Are you able to get into the system bios? If so you should be able to set it to boot to the floppy disk. Sometimes there are 2 places, under boot device setup and under security (allow external boot device) that needs to be changed.
I am unfamiliar with IBM laptops, but I beleive there is a security chip, that if it is activated, you would need to take the system to a shop to get into the bios again.
Also, can you boot to CD? This could save a lot of time and hassle.
If you cant get into the bios, and/or boot to floppy/cd, then The Chas has the best alternative, place the drive into another system and format it, and then sys the drive so that you can install the OS on the laptop.
If you put the drive onto a desktop system you will need to pick up an adapter (around here they cost between $8-$12.