This article references VMware Workstation 6 as being able to run OS X with some hacks, but it's slow. But more importantly, that article runs down what I thought was the only known solution to running OS X in a VM: VirtualBox. So you aren't going to be able to do this with Fusion, but you can do it with VirtualBox.
Also: Apple does allow virtualization of OS X Server (check the date on that article - circa 2007). It honestly wouldn't stand much of a chance in the big, corporate IT world if it couldn't be legally virtualized these days.
You need to extend the windows disk size from a running windows.
Here is how you do it: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1007266
Now that you have extended the VMware image size, you need to start at #6 in the link.
EDIT:
I don't want to write a new answer, and the comment text-box isn't large enough - so here is a more less re-write of the link:
1) extend the VMware image size.
2) attach the HD image to an existing virtual disk of the same OS as the resized image (Virtual Machine Libary->[select the VM to use]->Settings->Hard Disks->[click +]->[select the new HD in left menu]->File name->Choose existing disk...->[navigate to the resized image, and select the .vmdk]->[choose "Share this virtual disk....."]->Open->Apply) - if you will go the safe way, you'll choose "Make a separate copy af the virtual disk" instead of the "Share this virtual disk...."
3) Start the virtual machine that you just attached the new HD to.
4) Now because you are using Windows 7, you need to go to "Start->Computer Management->Disk Manager" and right-click on the partition you need to extend, and select "Extend Volume".
5) power off (shutdown VM) - and remove the HD attached in #2 - don't delete it...!
6) if you in #2 choose to make a copy of the .vmdk, then you need to replace it manually in the VMware image file (package) - right click on the VMware image (.vmwarevm)->Show Package Contents.
7) Power on the virtual machine from #1, and verify the disk size change.
Best Answer
The text file that Fusion uses to assign this is editable when the VM is powered off (don't suspend, shut down the OS):
uuid.bios
section in<>.vmx
file (f e.g.uuid.bios = "aa aa ..."
)..nvram
fileIn "About this MAC" you must see