Mainly the .06 Large F: , is used when you set uo a new hard drive with no data...
.67 is F: & G: partition..Which will be f: up to 137gb and G: the rest.... This is only used really if data is on hard drive already. and you don't want to erase and start again, otherwise you will get data corruption...
The other time you would use it is when you have larger than 250gb hard..
Apparently over that size data corruption may occur because of the large partition size and a G: would be required...