A bootable floppy can be created manually in 2 steps:
Prepare a bootable floppy disk or startup disk
Copy UNERASER.EXE, DOS4GW.EXE files to the bootable floppy disk or startup disk in drive A:.
STEP 1: Preparing a bootable floppy disk or startup disk
Put a blank 3.5-inch floppy in the floppy drive (A:) and follow the appropriate instructions below for:
MS-DOS, Command Prompt mode of Windows 95/98
MS-DOS or Command Prompt mode of Windows 95/98:
On the screen, type the format command as follows (see figure below): FORMAT A: /S
Follow on-screen messages until process is complete.
Click the Start button and click Settings, Control Panel
From the Control Panel screen, click Add/Remove Programs
In the Add/Remove Programs screen, click the Startup Disk tab
Click the Startup Disk button and follow the screen instructions until the process is complete
Right-click A: drive.
From the drop-down menu, click Format...
Enable the checkbox beside Create a MS-DOS startup disk.
Click the Start button and follow the screen instructions until the process is complete
If you have created a MS-DOS boot disk in Windows XP, you will have to delete some files to make some more room on the disk.
Delete the files: EGA2.CPI, EGA3.CPI, EGA.CPI, KEYB.COM, KEYBOARD.SYS, KEYBRD2.SYS, KEYBRD3.SYS, KEYBRD4.SYS, MODE.COM, DISPLAY.SYS
That should free up enough space to fit both UNERASER.EXE and DOS4GW.EXE files.