I can't work out what Densityy or wilko is talking about.
Could the OP please describe the current partitioning layout, and the desired layout? We'll then tell you how to get from one to the other.
Could wilko please tell me why a 1gb boot partition is of any use here? A boot partition for linux just needs enough space for a couple of kernels, 500mb is generally overkill, yet the OP is clearly using windows. As far as I know windows never uses a boot partition, it certainly doesn't need one for a multiple boot system.
gparted probably is the tool you want. A bit more intuitive for a m$ user to get the iso which only has gparted on it, rather than hunting around ubuntu's menus looking for "partition editor". gparted should be available directly
here, though you may need to follow the links along from
here.