I CHANGED MOTHERBOARD AND CANT USE THE ORIGINAL XP

HI, I HOPE SOMEONE CAN HELP ME WITH THIS ANNOYING ISSUE.
I BOUGHT A TOSHIBA LAPTOP, WITH ORIGINAL WIN XP INSTALLED.
A FEW MONTHS AGO I SPILLED MILK ON THE KEYBOARD, AND, AS YOU MAY HAVE SUPPOSED, IT CRASHED.
I CHANGED MOTHERBOARD AND CANT USE THE ORIGINAL WINDOWS XP INSTALLATION DISKS.
THE PROGRAM RECOGNIZES THE DIFFERENT MOTHERBOARD AND REFUSES TO INSTALL.
IT”S AS IF YOU HAVE BOUGHT A FERRARI, YOU CRASHED THE BODY, BUY A NEW ONE, AND VOILA, THE ENGINE REFUSES TO WORK IN THE SAME CAR.

I FIND THIS UNFAIR, CAUSE I PAID FOR THE PROGRAM, NOT ONLY THE COMPUTER.
DOES ANYONE KNOW IF THERE IS A SOLUTION TO THIS?
I WILL APPRECIATE ANY HELP.
THANKS IN ADVANCE. JAVIER RAMOS