board replacement

Hey folks, short story - yesterday I fitted a 250hdd to my rig so I can use for my dslr photos/music etc.

I am replacing my mobo this morning (old one under warranty).

(I have a 64b ssd for os and a 256 ssd for fsx)

when I put it all back together, I assume i will need to format at least my os ssd (drive c), but will I need to format my other ssd or the hdd (drive g)?

Secondly - i know i can download all my fs stuff onto my hdd but can i extract it all there also? - utx gex pmdg etc

I realise that it all still has to be installed onto my F\FSX drive.

I do not mean to be pushy here, but i need to start this in the next hour or so, as the wife and child are out shopping.

replacement motherboard is the same as the current one (P8Z77 V PRO).

I have also posted on simforums, as most of my software is from there 

I had guessed I wouldn't have to reinstall windows as its the same mobo, but I am preparing myself for it :( and if I did, then formatting it/them - I would do at the install windows stage

Thanks