On Drive letters. Your DVD/CD drive is probably D:
What I do is set the DVD/cd Drive to C + a few letters. to keep it out of the way (ie G .
Then you can set your HDD to D:.
It's not a big deal if the CD/DVD drive is D and the HDD is E. Just change my example from D to E, so "E:\WhateverFolderNameYouWant" when installing a game on to the HDD. For example I have my steam as "D:\Steam" but it coud just as easily be "E:\Steam"
^, Correct, Not a big deal and does not effect functionality.
Myself I do it from strickly an organization reason.
A & B = "floppies"
C-> whatever. I normally have two SSDs ( C & D) then two HDDs normally E-> G, and a BD-RE ( H and DVD Drive (I). Small System partitions I throw them Up to M: and above.
On straight vs Rt angle sata cable - which ever fits the best.
"ok so my ssd had a 100mb of reserve so i caned that. " and WHY.,
Your SSD should have two partitions on it 1) a small 100mb System partition and 2) a partition that is the OS + programs (Your C Drive.)