I already have Win 7 home premium 64-bit installed and due to my data would not like to re-install or wipe it to install Snow Leopard (No Leopard).

My laptop is Emachines E730G with core i3-350M, 3 GB ram, ATI radeon HD 5470, Atheros AR5B93 wireless card.

However, I have enough free space in my harddisk to partition for Snow Leopard.
My questions are:
1. Can you tell me step-by-step how do I install Snow Leopard?
2. Which flavor of snow leopard is better (I've Snow Leopard retail DVD 10.6)?

I hope to get some suggestions or links. I did many google but could not get a confident solution, at least, for me.

Thanks for reading.