NEED Helpwith installing LEOPARD with -Dell GX280

[uniqueOSX]

I have a Dell GX280 it has a P4 w/HT 3.06 Ghz, with 256MB PC3200 ram, not sure what the other specs are, as I got this from my work after they wiped everything from the HD. So, I decided to us this to install OSX.

 

I need help on this, I'm not sure what is wrong, as I finished installing Leo4allv2, I click reboot and it just reboots back to the OSX installation.

 

I also tried Iatkos v. 1 and this one just freezes about 13~14 minutes before installation is complete. Not sure why this is happening.

 

Below is the screen that it freezed on when installing iAtkos v.1, I added a partition and selected Master Boot Record in the options, and Mac OSX journaled. Am I doing anything wrong?

 

Any help on this would be appreciated. Thanks in advance.