Checklist of requirements before starting installation:
-Partition editing software like Gparted, you can use the one that comes with Ubuntu LiveCD or many other Linux distros.
-Mac OS X 10.5.2 Kalyway.
-EasyBCD.
Note: It’s highly recommended that you back up all necessary files before starting and remember the worst case this process might lead is just to reinstall your normal OS if you have your files backed up.
If you didn't install Windows yet then please do now, in this article I assume that you are going to install Mac after having installed Windows.
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Part 1: Installing Mac OS X

1- Burn the image on a DVD using software like Imgburn ( a great free and open-source burning software).
2- Insert the DVD of Mac OS you have created out of the ISO image into your DVD drive and restart you system.
3- At the start you will be propmted to start Mac OS X installer, If this is not happening then go to the BIOS settings and set the first boot device to DVD.
Now press F8 before the installer starts it’s default option (Normally it counts down from 10 seconds) and then press ‘ –v ‘ .
Wait a couple of minutes while the DVD diagnoses your system and then a GUI will come up.
4- Click on Utilities that’s found on a menu bar up on the sreen and chose “Disk Utilities” select the partition you want Mac OS to be installed on and then chose the tab labeled “Earse”.
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You have to be careful here, DON'T chose a volume that is lying within the same extended partition where another OS is installed. looking at the figure below, Each of the boxes numbered from 0 to 3 is a Partition a primary one, the box number 3 is a special case where it is called an extended one because it can be extended into other "Logical" partitions of different filesystems. But It can't be accessed as one entity. What I tried to point for is that If you have already installed Windows on Volume Nr. 4,5 or 6 then don't install Mac OS on any of the other volumes of 4,5 or 6. You can know that when you open Gparted and look at the partition of your HDD.

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5- There will be a drop-down menu where you are going to pick “Mac OS Journaled” from it do that and then right below that drop-down menu there is a text box for you to name that Partition you dedicated for Mac OS, enter a suitable name and then click on Earse after you will get a confimation box so you are sure about your decision and thus click Earse one more time. Close the Disk Utitlites window and you will be back into the installation Window.
6- Click Continue and then agree.
7- Select the patitition you have prepared in the Disk Utilities , you will be easily able to identify it by the name you gave it earlier, Now click on Continue.
8- Click on Customize and make sure not deselct any of the packages that are selected by default.
9- Click Done when you are DONE and then Install.
On My system it took just more than 20 Minutes.
10- System must be restarted and make sure pop the DVD out upon completion of installtion.

See in 10 setps only you got the Mac installed on your PC. WOW.....Proud ha??
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Part 2: Fixing the boot manager
Now After having Mac installed you will likely not be able to boot into Windows, but the purpose of this article is to show how to DUAL BOOT actually, so let's start the second part.
We need to be able to reach Windows and from there we are going to use EasyBCD to modify our bootmanager so that it shows us 2 boot choices every time we start up the machine.
1- Pop in the Gparted LiveCD or Ubuntu LiveCD and after booting start Gparted.
2- Right click on your Windows partition and select Manage flasg and then make a check on "boot".
3- Restart the system and remove the LiveCD when you are asked to or before system starts again.
4-Ok,Now you must be taken to Windows.
5- While in Windows setup EasyBCD and open it after finishing.
6- Click on "Add/Remove Entries" from the buttons on the left side of the window.
7- From the Drop-down menu called "Platform" chose "Generic X86 Hardware".
8-Now type in the label for the item that you will see in the boot selection menu which will be pointing to Mac OS.
5- Now click on "Add Entry", close the program and you are DONE.
Restart and Enjoy
Hope it was useful, my first contribution on the web.
Noor Iddeen