XP installed after 2000 can not be used

XP installed computer system (Host XP) in the C disk and then installed in the F set in 2000, after XP could not look into the flash on the screen to black .2000 has been able to enter normal.XP from the Internet to find under the 'NTLDR' And 'RDETECT.EXE' of the two documents, to enter WIN2000, copy it to disk under F.(But do not know WIN2000 to copy the folder to which it can dual-boot XP and WIN2000) as a result of how the changes can not be modified, Is not re-installed the XP system will be one, so you can make XP and 2000 can be used!? Online, and other urgent

Should be copied to C Packing directory on the line.Windows operating system in order to achieve a smooth multi-system installation by the high-end version to version of the installation, or else you will cause unnecessary trouble.
To reinstall XP E:\ try.