How can I use VMware Vcenter converted to resize a linux partition on the guest (Windows 7 host)? I've increased the size available to windows, but am having problems repartitioning the linux disk in the guest to make use of it.

How can I use VMware Vcenter converted to resize a linux partition on the guest (Windows 7 host)?  I've increased the size available to windows, but am having problems repartitioning the linux disk in the guest to make use of it.