Come on folks, read the *censored* question! He's getting "bad command or file name".
That suggests that DOS cannot find the format.com program, either because it is missing or wrongly named. Sooz, look on the boot disk for a program file called format.com. If it is missing, you can find it on a W98 install disk in the "Win98" folder.
This is what you should have on a Windows 98 boot floppy.
Here's what's on a win98 startup floppy, made from a working 98se.
Volume in drive A has no label.
Volume Serial Number is 288A-8B81
Directory of a:\
23-04-99 22:22 1,103 AUTOEXEC.BAT
23-04-99 22:22 629 CONFIG.SYS
23-04-99 22:22 1,416 SETRAMD.BAT
23-04-99 22:22 14,764 README.TXT
23-04-99 22:22 6,855 FINDRAMD.EXE
23-04-99 22:22 12,663 RAMDRIVE.SYS
23-04-99 22:22 14,386 ASPI4DOS.SYS
23-04-99 22:22 21,971 BTCDROM.SYS
23-04-99 22:22 29,620 ASPICD.SYS
23-04-99 22:22 30,955 BTDOSM.SYS
23-04-99 22:22 35,330 ASPI2DOS.SYS
23-04-99 22:22 37,564 ASPI8DOS.SYS
23-04-99 22:22 40,792 ASPI8U2.SYS
23-04-99 22:22 64,425 FLASHPT.SYS
23-04-99 22:22 93,242 EXTRACT.EXE
23-04-99 22:22 63,916 FDISK.EXE
23-04-99 22:22 68,871 DRVSPACE.BIN
23-04-99 22:22 93,890 COMMAND.COM
23-04-99 22:22 33,191 HIMEM.SYS
23-04-99 22:22 41,302 OAKCDROM.SYS
23-04-99 22:22 272,206 EBD.CAB
23-04-99 22:22 49,575 FORMAT.COM <------------------------------IS THIS ONE PRESENT?
22 File(s) 1,028,666 bytes
0 Dir(s) 200,704 bytes free