on windows xp, press the Win button + R and type msconfig and press enter, do you see windows 7 AND windows xp there?
if so then you could select windows 7 and click the 'Set As Default' button so it boots straight into windows 7 instead of XP, hope this helped, even though i was vague, charlie.
edit: sorry, you have to click the 'boot' menu first in the msconfig window you open, sorry for not including that !