Yes but find out exactly what you are doing before you start. Installing Linux is not something you want to stumble through with only half an idea of what you are doing.
It is a good idea not to put the bootloader on the HD and have it loaded on a floppy as well. This means using a floppy to boot to Linux but it cuts out the risk of damaging your MBR and being unable to boot to any OS.
Go to Google and search for 'Linux XP duel boot' for info and good luck :o)