the tutorial is great but for your information,i dont have mac yet..i have windows only..how to install mac iso into usb THROUGH windows in order to boot from usb?help me.

There is no way, you have to have a working mac to crate it.

how about start with virtual machine first?vmware.?virtual box?

Create USB installer with virtual mac
 

Fortunately, you can make an usb installer under windows, as I did.
The method is the following:

• Download a leopard or snow leopard vmware image from a torrent site (btjunkie "mac vmware")
• Download the free vmware player
• Boot the mac vmware image, it may boot without errors. (Open virtual machine, than play virtual machine. At the settings give at least 1GB memory to the virtual machine)
• I couldn't find how to create shared folders with vmware mac so I copied the Snow Leopard installer.dmg to my usb, than I copied the dmg to the virtual mac's desktop.
• Copy the installer script and the kexts to your virtual mac, and follow the installer script's steps.

From that point you can follow the youtube tutorial too. I've managed to install snow leopard in this way.

Feel free to ask.
Adam

i already downloaded vmware workstation 7,but still got problem,because always got stuck when the percentage reached 88%...I used various distros,but the result still same..

Are you using a mac vmware image or try to install mac to a vmware virtual machine?
I suggest you to use a vmware image, so you don't have to take time to install and configure.

vmware image is kind of file that has dmg extension?

Almost. It is a fully installed virtual mac, saved to an image file which is exectuable by vmware.
Choose one.
For example.

i have downloaded mac vmware image.it is in 7z extension.but once i extracted to a folder,i dont know which file should be ran on vmware?alot of folder there.

Don't care about it. Just run vmware player, choose "open virtual machine", browse to the directory, and you shold see only one file which is executable, than "Play virtual machine".