An 8 week old baby is far too young to let "cry it out". Dr. Ferber and most experts agree that the "cry it out" method should only be done with babies 6 months or older. Even then, I think the method is a progressive one, wherein the parent goes to check on baby throughout.
Seriously, he's far too young to do this. Picking him up everytime he cries is what teaches him to trust you, his mother. It's perfectly ok! you are NOT spoiling your baby if you pick him up when he cries.
My first two children are ages 4 and six. They were held, rocked and nursed to sleep for as long as they wanted (the first self-weaned at 2 when I was pregnant with the second, and the second self-weaned at 17 months shortly before my littlest baby was born). I picked mine up when they cried. I assure you, they have not suffered nor are they spoiled by being picked up when they cry. Both of them go to bed easily and fall asleep easily, without any crying or fighting with us. It is completely possible to have good sleeping children without tears and without "training" them. I think showing your child what good sleep feels like (by helping them when they're babies) allows them to learn how to fall asleep. Mine always fell asleep at the breast, but they don't need that now, and i didn't follow a sleep training method. They just outgrew the need at their own pace, rather than one imposed by me.
I am not trying to "scold" you, I'm merely trying to show that it doesn't have to involve tears nor "training" to get your babies to fall asleep eventually. you just have to have patience that it will happen when they are ready. Dr. Ferber's method does not involve such a very young baby. If you're seriously wanting to do this method of sleep training, wait until he's 6 months or older and in the meantime, read up on what the Ferber method is. It will help tons.
For now, I highly recommend Dr. Harvey Karp's Happiest Baby on the Block. The 5 S's are essential, IMO, to helping a baby feel comforted to sleep. They are: swaddle, swing, "shake" (you have to read about it to understand, you don't really shake your baby!), ssshhh, and suckle (yes, nurse or bottle). He helps you understand what babies at this age need. He also advocates a "cuddle cure" to help spark the baby's "calming reflex". I have suggested this book to three different friends, all who just KNEW they were spoiling their babies by picking them up, and a week later all three had called me singing the praises of this book/DVD. Their babies slept much better after that.
I implore you - don't force your newborn to cry it out. He's too young. If you do want to use that method, wait until he's older. If you'd like to try a gentler method that's perfect for a newborn, try Happiest Baby on the Block. His excessive sweating is most likely because he's being left to cry for that long. It's hard, I know, and I would wear my baby in a sling when he/she (I have two boys and 1 girl) needed to be held and I needed to do something else. With my third, I am sometimes doing something that causes him to cry for a minute or so (giving the others a bath, and i can't run to him right away) and even in that short a time he is sweating. I've learned to bring him into the bathroom with me while I bathe the bigger kids!