Getting the right partition amount??

[DivideByZer0]

I currently have vista which is my first mistake :-X so I want to install Kubuntu on a partition and dual boot. I have used kubuntu before and liked it but here is my issue.

when I go into my disk manager and attempt to partition my main 250gb HDD...

C: 250gb capacity (i have a small partition on it so its actually 231.42GB cap)
141.08 GB free space

when i try to make oh say a partition of 100GB it will only let me make a 98 MB not GB.. but MB partition.. here is what it says

Total size before shrink in MB: 236974
Size of available shrink Space in MB: 98
Total size after Shrink in MB: 236876

why wont it let me make a larger partition reformatting is NOT an option.

[muzicman0]

Re: Getting the right partition amount??

are you just entering 100 as the size? Try entering 100000.

[DivideByZer0]

Re: Getting the right partition amount??

it wont let me enter any number larger than 98 which it think is 98MB... I know that 100000is 100GB but it wont let me do it.. would it even be that bad if I picked up another laptop HDD, formatted it and used the live cd and just had kubuntu on its own HDD?

[aged hippy]

Re: Getting the right partition amount??

May i suggest GParted Live - but IIRC the Windows installation will require several passes of the de-fragger before doing anything to the HD.