NEED PC HELP

[69fastback]

I am trying to install windows 98. I have the floppy with fdisk and all that on it. I put in the disk and it says to install windows 98 from the cd. When i do this it goes to a screen that says i need to reformat my hard drive. during the format it stops and says that windows 98 can't be installed on my computer. Then I try and install it straight from the d rive by typing in setup. It will go to the setup screen. Then when i hit the install it tells me i need 205 mg to install windows. My hard drive is 10g and is blank so i dont understand what is going on.