Extend Size of VirtualBox Harddisk (vdi)

When create vdi, sometimes not well planned. The partition is too small. We have to extend it.
Preparation :
- gparted live CD or Ubuntu live CD Desktop edition 8.10 with Gparted inside it.
- bootbuild

1. Make a new vdi partition with bigger size as required.
2. Using VirtualBox, Clone the vdi disk content with gparted from Ubuntu live CD (Boot from cd with 2 vdi hdd attached).
3. When try to boot the new cloned vdi disk, error will come. Fix using bootbuild.
4. Retry to boot new vdi disk, should be ok.
5. (optional) delete old vdi disk.
6. Done.

Wis rampung...