Hi rajibando
Your proposition seems to be appliable
Installing then Grub on the USB disk.....with the risk not being authorized to connect the fixed HDD.
Perhaps it wil be possible to use the cheatcode "grub" which then could be searched for by knoppix7.4.2 himself.
I shall try it so preserving perhaps the WinXP drive connected afterwards before rebooting.
Best regards
knp













