How could you install Windows XP in a PC which do not have CD Rom driver and in its BIOS program there is not a way to boot with USB flash disk ?

With external CD/DVD ROM or from network PXE boot

What do you mean sir there is no usb input too? but if there is an usb input..

Yes.. You can still use a portable CD or DVD Drive connected on usb input.. :-)

Hi, Ideally there should be an option to boot the device through USB, however if this option is not available, Try using external CD/DVD device, also you may try once using USB port if availble on computer or through Network servers available online.

I think that the best way for you to install your windows XP In this case (Without USB input and without a CD/DVD Rom ) is by a network

Here Are a couple of links that could be helpful :

Link1

Link2

Through Network PXE interface

In this case we have3 options 

1st one is boot from network and get the instlation files from shared folder at the network bath 

2nd one is use sccm and push the windows instlation by it

3rd one  use windows deployment service (WDS) or Remote Installtion service  to install windows on remote computer 

There's another way you can Install Windows XP From the Hard Drive via DOS but it takes little long time than USB & CD or DVD

Requirements:

Windows98SE Boot Diskette w/smartdrv.exe

Windows XP saved to hard drive (You need to have a separate FAT32 partition where XP install files are saved.)

Use the following steps to install Windows XP from the hard drive:

1. First, copy your Windows XP Setup CD contents to your hard drive. I recommend saving the XP install files/folders to a partition separate from where you are going to install XP. (e.g., Have setup files at d:\\winxp\\, and then install XP to c:\\ drive.)

2. Now, boot your PC with the Windows98 SE boot disk with smartdrv.exe on the floppy (This increases data transfer speed by ten-fold in DOS.). You do not need to boot with CD support since you are installing XP from the files on your hard drive (in my example, D:\\winxp\\).

3. At the command prompt, format the partition where you are installing XP (e.g., the c:\\) by typing: format driveletter:. Replace the drive letter with the drive (e.g., format c:). Then go through the prompts.

4. Once that finishes, change drives to the drive with XP on it.

In my example, D: then Enter.

Then: CD WINXP (change directory to winxp folder) and Enter

Now, enable smartdrv by typing smartdrv and then type it again. The second time you type it and hit Enter, it will show the status of the drives and cacheing.

5. Now, change the directory to the i386 folder by typing cd i386 (In my example, this folder’s full path would be D:\\winxp\\i386\\.).

Then type winnt to start the installation.

Finally, install XP as usual.

- See more at: http://www.tech-recipes.com/rx/578/windows-xp-installing-from-harddrive/#sthash.fYNVB7Pu.dpuf

either an external CD/DVD rom can be be used or Remote installation can also be considered .....

Install through the  network boot PXE from a machine that has the operating system

It's steel posible to install xp when pc has no cdrom or usb drive ...

From RIS (Remote installation service) in windows2003 server and WDS (windows deploy service) in windows8 server..

This are the service provide the facility to install xp and windows7 remotely. only requirement is you have to configre your pc is boot from lan card

OK 

WE CAN INSTALL WINDOWS XP FROM SERVER USING NETWORK BOOT