Yes, you can either get a genuine Windows XP with SP3 installation disk.... or if you do not have one, use nLite (google it), to slipstream SP3 into your existing Windows XP installation disk - it creates a fresh ISO with the SP3 in it which you then burn to disk. You can also slipstream drivers and all sorts in there (but don't get too carried away otherwise you'll goof it up).
The former is better of course, because as always, Microsoft are better at making Windows XP installation images than anyone else.
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