How to Install Windows XP on A Vista Computer

I have a laptop Acer Aspire 4720z running a Pre installed windows vista, can I replace my windows vista with windows XP? Would there be any problem if i do that in terms of hardware and software, specially the drivers. I don't like to dual boot the system because it use to much hard disk space and I don't want to use any virtual machine. I have tried several times but i had no success. Can I really replace my operating system? I need help please.
