Just to add a tad to Liljim's post
IF you are prompted to overwrite the file type y and enter
copy d:\i386\ntldr c:\
Note the space between copy and d: and also between ntldr and c:\ in the first line
copy d:\i386\ntdetect.com c:\
same with the second line copy and d: and also between com and c:\
DOS is like witchcraft if you don't see the spaces
You might also want to install recovery Consol to your computer so you don't need to chase down the cd all of the time.
here is a cut and paste from Microsoft
To install the Recovery Console, follow these steps:
1. Insert the Windows XP CD into the CD-ROM drive.
2. Click Start, and then click Run.
3. In the Open box, type d:\i386\winnt32.exe /cmdcons where d is the drive letter for the CD-ROM drive.
4. A Windows Setup Dialog Box appears. The Windows Setup Dialog Box describes the Recovery Console option. To confirm the installation, click Yes.
5. Restart the computer. The next time that you start your computer, "Microsoft Windows Recovery Console" appears on the startup menu.