Resizing/partitioning with Partition Wizard, preemptive question?

Hi All. Am running Win 7 Home, and downloaded Partition Wizard to help me change partition sizes to create dual boot scenario with Win 7 on both drives. (Just fyi am trying to set up to do Android development and need for various reasons to have two development environments, one with regular Java/Eclipse/Android SDK, and one with Java/Eclipse and MotoDev install. Just checking here first, any advice on best way to make system partition larger before partitioning? I know from reading about Partition Wizard here on these forums it seems some people have blown their original install using this PW product. Am trying to avoid that if possible. Thanks a lot. webmeist

1.
Download their Boot ISO and burn a boot recovery CD in case of disaster.

2a.
Shut-down all other applications before committing changes to disc as they recommend.
In the past P.W. added/altered my partitions successfully many times,
but once I lost all partitions.
Defense+ in Comodo Internet Security doubles the time taken to copy or delete a large quantity of files;
I now believe any such protection should be shut-down when changing partitions.
BUT FIRST Disconnect the Internet to prevent infection and any "out-of-band" security patch installation.

ALTERNATIVELY

2b.
Use the Boot recovery CD,
That automatically ensures freedom from applications competing for resources,
it also avoids all the incessant business of Windows Services.

N.B. I do not blame P.W. for my partition loss.
I was making extreme changes,
plus the Boot CD included a Partition Recovery Wizard that made my world a happy place again.