Thanks again for your suggestions, they work.
Someone may have access to a Top Secret hard drive via the web.
1-I would like to erase the "XP Startup" line from a Top Secret hard drive. OK, no problem.
2-Then install a new hard drive and put XP on the new one. OK no problem.
Both hard drives are to be left in the same computer. OK no problem.
3-When the machine is restarted, is there a problem; only one has the XP Start up line?
4- Should the new hard drive be Master and the old hard drive Slave - or what?
5-Could I remove the new hard drive and key the "XP Startup" line back in the original?
Access to the Top Secret hard drive via the web is not acceptable.