You need a working OSX, an OSX installer, and an at least 8GB pendrive, or external hdd.
(I downloaded an image of an OSX to run in VMWare. Then I downloaded Mavericks from the App Store.)
Then you have to download a bootpack from here. I used the Dell D630 with nvidia graphics, because it's really similar to the Vostro 1400. After you have that you need myHack. In myHack you need to select Create OS X Installer. Select 10.9, select the drive where you want to create it, then select the place where the installer is. I think myHack can find where is the installer. It will ask if you want to use a general extra folder or a specific. At that point you have to select the specific extra folder, and select the bootpack which you downloaded before. When that's ready you can boot from your pendrive or whatever you used. The installer should boot up.
After you installed OSX and booted into, you have to download EDP. In EDP select Dell D630 with nvidia graphics, it will install the kext you need. There is one more thing you need to select, go to fix section and enable cookbook fix/ acpi. When it's finished you will need to reboot. After reboot you need a little tweaking. But everything is written down in this topic.
I hope I could help you.