The first thing that you need to do is stop trying to install and reinstall your operating systems. We need to exactly what you have doone so far. At first you said;
now i am not getting the option to opt either linux or xp. it just boots xp by default.
This led me to believe that you installed Fedora totally to the second hard drive, along with the /boot partition created during the process.
However, then you apparently tryed a repair install of XP, which failed. Now you are getting...
well i tried to repair my xp. and when the setup restarted first time after copying setup files even then it loaded fc6 by default and there was no menu to select from, the OS not for even single second...
How did you "remove" Fedora, by just reformating the second hard drive? If so, this will not work IF you actually changed your bootloader to reside on the primary boot drive. in this case, the Grub bootloader is still resident on the MBR of the sata drive and needs Fedora to boot.
Let's look at what happens. When you get to the installation screen that allows you to set up your drive(s) you must use caution. If you read my article, then you know that you must pass special directions when installing to a second hard drive. If you did not uncheck your sata drive when partitoning your hard drive and allowed Fedora to alter the sata drive, then a /boot partition may have been created on your sata drive. In this case, then your master boot record could have been altered by the creation of this /boot partition.
When you installed Fedora, did you uncheck the sata drive, so that any changes did not affect that drive, but only the second hard drive, that you wanted to install Fedora to?
Let us know where you are exactly at this point.
Also, you should be able to recover XP's bootloader using the Windows Recovery Mode, if need be. This assumes that you know your admin. password for Windows.
But remember, you have tried installing multiple operating systems now on the system, so it is hard to determine what you did during all these install attempts.