Problem with MBR after trying boot XP with Hiren's BootCD (on the flash drive)

I've just tried booting Windows XP (SP3) with Hiren's BootCD (15.1) on the flash drive , just to make sure that the program work with the drive , and it worked well but then I remove the flash drive my notebook still trying to find for a file call "grldr"(which is a part of Hiren's BootCD process file) and of course the file cannot be found because I've removed the flash drive.So how can I make it normal like before? Even it's not a big problem because I've just have to wait for 5 seconds then the process will boot on previous MBR which is back to normal but it seem to be unusual and annoying for the user.

-I've set the harddisk on primary as well.

This is what the boot process mention:

Try (hd0,0) : NTFS5 : No grldr
Try (hd0,1) : invalid or null
Try (hd0,2) : nvalid or null
Try (hd0,3) : nvalid or null
Try (fd0) : invalid or null
Cannot find GRLDR
Press space bar to hold the screen , any other key to boot previous MBR...
Timeout : 5...4...3...2...1...0 > (then it will boot on previous MBR which is the original one that work normal)

-What should I do with this ? I've search for many solutions which are :

1.Boot with Windows XP CD > Mode Recovery > fixmbr > fixboot
2.On dos type fdisk /mbr , on Windows use Patition Magic(delete partition then create and allocate the new one)
3.Use the program from Hiren's BootCD , then which program I should use and what command I should type please give the details step by step.

And will the datas in my notebook lost or damaged ,then should I prevent by backing up or ghost or do something or it is very safe to fix MBR by using your resolution.

Respectfully

Thank you so much