Mountain Biking - free wheel,and derailleur????

hi, everyone i am new here, i am trying to build a bike from scratch... i realize that they are alot of parts out there and triying to figure out, how they all come together, i need to buy a shimano hg cassette 9 speed 11-32T for my bike and also need a super narrow 9 speed chain, now here is my question will any shimano derailleur work with the cassete and how about the rear derailleur and crankset , is there a website or book i can look at i need to make sure the parts i buy will all work together... thanks for your support .....

Good luck with that. Why are you trying to build a bike from scratch when you have no knowledge of the subject? Is this an experiment or for serious riding?

Google Sheldon Brown. That's a start. Then go to Park Tool's website. It might help.

Do lots and lots of research before!

Heck I built a fixed gear road bike from ground up as practice before I build up a new mountain bike with all the gears and suspension. It may seem simple but there are tons of little gotchas

Good luck with that my friend...

hi, everyone i am new here, i am trying to build a bike from scratch... i realize that they are alot of parts out there and triying to figure out, how they all come together, i need to buy a shimano hg cassette 9 speed 11-32T for my bike and also need a super narrow 9 speed chain, now here is my question will any shimano derailleur work with the cassete and how about the rear derailleur and crankset , is there a website or book i can look at i need to make sure the parts i buy will all work together... thanks for your support .....

it's not rocket science. hope you have fun!!

What exactly are you building on? Did you buy a new frame or are you rebuilding an older bike? If your rebuilding an older bike with an 8 or 7 speed drivetrain you may wish to have a bike shop help you pick out a BB with the proper length. I had an early Gary Fisher Marlin that needed a different BB while a slightly newer GT was able to use the original BB. The Fishers chain line sucked until I got a slightly longer BB. It originally came with 7 speeds while the GT had 8. Both were converted to 9 speed. Depending on your your crank choice a new BB may be unavoidable due to type. ISIS, square taper, ect.
Modern bike parts are mostly interchangable, my Dakar XLT came with Truvativ Husselfelt cranks, an XT rear derailleur, SRAM cassette and front derailleur and Deore shifter pods. Notice that the rear der and shifters are from Shimano. With a couple of exceptions( Rocket, Attack) Sram shifters don't work with Shimano rear derailleurs. The easiest thing to do is pick a group and get a matching drivetrain. Go all Sram x7 or all Shimano XT. Your crank choice is less important, just make sure it's the same speed type as everything else. If your on a budget drop down a group. All Deore LX with a Deore crank for instance.
Park tools website has excellent repair instructions and there are several books on bicycle repair. Try googling Bike repair books. Buying your parts from the LBS also buys you some free advice on installation. Have fun and post up a picture or three when you get it done.

it's not rocket science. hope you have fun!!

It's not, but it can be challenging. I had a bike that was a little big for me, so I stripped it down, sold the frame, bought another, and went to put all the old stuff on. I ran into a few problems. FD needed to be a bottom swing, bottom bracket shell width was wrong and I didn't have the spacers, etc. All little things, but it was a great learning experience.

Good luck, and don't be afraid to ask questions. The mechanics forum is helpful as well.