100% bootable with boot .iso image ,you can also boot your P.C with pendrive also with rufus v1.3.3.exe make bootable pendrives!
System requirements for Windows XP Professional x64 Edition are as follows:
Processor: x86-64 processor;
Memory: At least 128 MB of RAM;
Video adapter and monitor: Super VGA (800 x 600) or higher resolution;
Hard drive disk free space: At least 1.5 GB
Visit its Official website click here