Designing a Gearbox for Lifting an Object of 2kg

[chan]

hey guys, new here. need some kind of help
im required to design a gearbox which will be used to life an object of 2kg. details of the motor used are as follows:

http://www.jaycar.com.au/productView.asp?ID=YM2712

have been trying to calc the number of gears needed, number of teeth on each gears but no avail. so is there any advice on how to start? thank you very much.

 

[Baluncore]

Welcome to PF.
How high do you have to lift it?
How fast do you have to lift it?
Where will you get your gearwheels from?
Is it lifted by a string round a drum? or on the end of a lever?