ok, since people are having a hard time with this, I am going to explain how to properly put OS X on their beige with XPostFacto.
First, you are going to need XPostFacto from here. When you got that, you are going to need to install OS 9 on the system. but before you do that, if you have a drive larger than 7.6GBs, I would suggest that you partition it so that OS X resides within the First 8GB. I have done it without doing this, I mean, install a minimal 9 and then 10 right after it, but it can sometimes mess things up on a machine (hasn't done anything to mine )
After you install 9, you *might* want to install the upgrades (like getting the system all the way to 9.2.2). After you do that, you are going to decide what you are going to install (i am doing 10.3 and 10.4) (note: It is suggested that if you have problems with the install, you might try a dvd drive?)
Installing OS X
Ok, here we go...
Put in the first CD (or DVD) and go into xpostfacto and click the partition that you want to install it on (You will need to make it on the first partiton that is less than 8GB) and click on "options". Make Sure both "Use Verbose Mode" (for diagnostics), and "Use old NDRVs" That is going to force it to use the old Video Drivers. (DO NOT HIT "ENABLE L2 CACHE" it will screw up the system!)
get out of that box, and make sure the drive you are installing onto is highlighted then click "restart now"
Continue to install OS X. BUT! when it restarts the first time, hold down the option key and go Back into XPostFacto.
Go to the menu item called "install" and go down to "everything". let it install the stuff, and then highlight the OS X box and click restart now. Hopefully you won't have a problem...
IF you need anything, i will watch this forums, so post your problems