I would write OS X on a USB stick and boot from it.

You will need:

• A working PC, which I'm assuming runs some version of Windows.
• A USB stick.

Follow these steps:

• First, get a .dmg of the OS X's version you need.
• Download the 15-days trial version of TransMac.
• Backup any data from the USB stick. You are going to erase it entirely.
• Launch TransMac, locate the stick, right-click on it and choose Restore with Disk Image.
• Locate the .dmg image you downloaded and select it as the source.
• Once finished, push the stick in your Mac.
• Power it and keep pressing the alt key until some icon pops up.
• If you really erased the entire disk, there should be just one, and should be named something like "OSX Install".

I would write OS X on a USB stick and boot from it.

You will need:

• A working PC, which I'm assuming runs some version of Windows.
• A USB stick.

Follow these steps:

1. First, get a .dmg of the OS X's version you need.
2. Download the 15-days trial version of TransMac.
3. Backup any data from the USB stick. You are going to erase it entirely.
4. Launch TransMac, locate the stick, right-click on it and choose "Restore with Disk Image".
5. Locate the .dmg image you downloaded and select it as the source.
6. Once finished, push the stick in your Mac.
7. Power it and keep pressing the alt key until some icon pops up.
8. If you really erased the entire disk, there should be just one, and should be named something like "OS X Install".