How to install a fw2 image for DM7000?

Hello.

I just picked up 'PLi® Jade3 - DM7000 Multiboot' for my DM7000.

It's bigger than the img files I'm used to, so I'm not sure if I picked up the right image.

Is it installed with FlashWizard or some other way?
Why the difference in size versus the standard 1.9.4c ?

Thanks for any help.