In reply to emV:
although its theoretically possible to climb and "easy" wall in 7 days for a complete beginner, to jump on a route like the nose the timeline normally looks like this.
day one: gear up, buy food, pack. get beta and worry about gear food and water
day two: climb and haul to sickle fixing the next two
day three: rest
day four: 4 am start, blast
fast team 3 days to summit
slow team 5 days to summit (at HVS this is you)
plus one day walk off and recover.
even if you loose the rest and suffer the walk off in the dark (getting lost on the way down FYI, its not as simple as McTopo says) and climb faster than I think you will you are still cutting your time and leaving nothing for a cluster'. you will also have no time to check out the decent or hang in the valley.
the other guidelines are as follows:
if you need to ask if you can do it, then you cant.
(not being funny here, big walls are more about attitude than skill, you have to WANT to be climbing rather than be on the summit)
you will probably fail the fist time even if you are fit and strong.
try something smaller like West face, regular route or south face if you only have 7 days.