Have a look at the all grain clone recipe from Maltmiller, it gives hop types, quantities and timings...
http://themaltmiller.co.uk/index.php?_a=viewProd&productId=611
5.00 kg Maris Otter (5.9 EBC)
50.00 g Chinook [13.40 %] - Boil 12.0 min
16.00 g Ahtanum [5.30 %] - Boil 5.0 min
16.00 g Nelson Sauvin [12.20 %] - Boil 5.0 min
16.00 g Simcoe [14.10 %] - Boil 5.0 min
16.00 g Ahtanum [5.30 %] Steep 0 min
16.00 g Nelson Sauvin [12.20 %] Steep 0 min
16.00 g Simcoe [14.10 %] - Steep 0 min
16.00 g Ahtanum [5.30 %] - Dry Hop 3-5 days
16.00 g Nelson Sauvin [12.20 %] - Dry Hop 3-5 days
16.00 g Simcoe [14.20 %] - Dry Hop 3-5 days
You would have to cut the hops to allow for the kit hopping. Certainly take out the 50g Chinook at 12 mins, I think. You need to stick all your ingredients in a brewing calculator to check bitterness, so you need to know how bitter the kit is if the extract is already hopped.