I've tried to boot it up in my usb thumb drive in 3 ways :
1. Directly use Winbuilder usb-script
2. Use Winbuilder iso-script, then usb-script
3. The way like "Kaspersky live cd"
At the beginning of boot, error comes out and hangs up with :
Welcome to Rescue CD 3.11 23804 Please make sure that you have access to the Internet. Either plug in your network cable or make sure you have wireless enabled.
1. Make a copy of f-secure.ISO to work with 2. Extract folder “knoppix and folder “boot” to a temporary folder 3. Extract folder folder “boot” to EasyBoot\disk1 4. Extract boot file from f-secure.ISO and save boot file as f-secure.bif to folder ezboot (I used UltraIso). 5. Use menu command in EasyBoot menu:  bootinfotable;run f-secure.bif 6. Check “Joliet” when creating ISO 7. Use easyboot-usb.script to get EasyBoot-ISO-file (mycd.iso) to USB. Attention! As this is “Knoppix”, you must use FAT32 as filesystem – do not use NTFS! 8. Copy folder “knoppix” and folder “boot” from temporary folder to the root of USB 9. When “boot-prompt” shows up in f-secure, write in “failsafe” as start-command and press ENTER.
Note: perhaps it’s possible to modify “isolinux.cfg” in folder “boot\isolinux” to have “failsafe” as default command – if so you can overwrite isolinux.cfg” in the two folders (the folder “boot\isolinux” in Easyboot\disk1 as well as folder boot on USB).
Regards balder
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