You won't be able to use your daughters copy of XP as it is installed on her n=machine.
Your Hard drive space is far to low to accomodate a dual boot system at present.
A new (larger) hard drve, and a leagal copy of XP will be requied before you start.
XP can be purchased quite cheaply at the moment, and a large hard drive is also quite inexpensive.
This will depend on your system specs. Post back, but in the meam time:
And for Hard drives:
Bear in mind that your current system will need to support the new kit.