It is much safer to feed frozen, live rodents are as likely to do harm to your snake as the snake is to the rodent. It can be very difficult to switch a BP to frozen so why mess that up?
Frozen rodents are not frozen alive, they are euthionized in a humane way.
You should feed the same size rodents frozen or live.
Is there a reason why you want to switch?
Yes Ive Heard Of How the Rodent can Harm The Snake , Thats Why I Was thinking Maybe multiple of the littler ones? and I Got Him a New Tank so I Would Have To Reach My Hand Inside To Feed Him, and Im not comfortable With That