I installed 2 OS on my machine. The first one is Windows XP and then I stalled RedHat 4 EL on it. Because there were so many viruses on Windows, I decided to re-install it. Unfortunately, after re-installing Windows, my machine can't dual boot anymore. I believe the data of my RedHat is not lost because I installed all of it on my F drive while re-installing Windows only erased the data on the C drive of my computer. Maybe the boot loader was deleted or something like that.
Can anyone help me solve this problem?

This may help.

http://www.sorgonet.com/linux/grubrestore/

the fact is clear, that when you reinstall Windows it removed the old MBR and placed the default XP one thereby removing any entries pointing to the linux installations you had there, though the rest of the things are/will be there untill you overwrite to that part of disk. It simply means that we've to modify the MBR and put entries to the old lilnux installation. So basically you have to retreive the details that point to the linux installations[things like head/cylinder etc]. This can be done using the linux LiveD. Have a look here,
https://help.ubuntu.com/community/Re...tallingWindows
This is meant for Ubuntu, though you can do the similar things for your flavor of linux.
Also go thru tis one,
http://salahuddin66.blogspot.com/200...l-windows.html
Have a look there and I hope you'll find things pretty simple . If you still face any problem, do let us know. I ask/request other people to provide their valuable suggestions for teh same. Thank you.
Always remember "Google is your best friend".
Thank you.

Thanks, I inserted the installation disk and ran its rescue mode. At the command prompt, I typed the command "grub" and the grub prompt appeared just as shown in the guide. The problem is when I ran the command find /boot/grub/stage1 in the "grub" prompt, it said that "File not found." even though the file does exist in my system. I have no idea why.