OSX Leopard Server Update on SSE2 machine
 

I've installed a Server version of OSX 10.5.4 by using Leo4all Server on a pretty old machine. Here are the specs:
-Intel P4 Willamette 1.5Ghz
-Compaq D3D OEM motherboard (Intel chipset)
-384Mb PC133 SDRAM
-TNT Riva2 VGA
Despite this ridicolous hardware, everything is working fine and rocksolid; network, audio and video (no QE/CI, of course) worked just out of the box.

By the way, I was wondering how to update my system. Of course I can't run vanilla, so i used an SSE2 prepatched kernel. Thus, here is the question: what are the differences between Server edition and "normal" one? Can i use, for example, ideneb prepatched combo updates? I couldn't find nothing specific for Server edition in the OSX86 scene.
Any help could be much appreciated.

Make a back-up of your Kernel Binary and your Extensions, install Disabler.kext and fakesmc.kext v2 for Leoaprd and remove dsmos.kext or AppledDecrypt.kext (depending on which you use). Then run the Systemupdate.

Back-Ups on Terminal:

sudo -s
cp /mach_kernel /back_up
cp -R /System/Library/Extensions /Ext_bak

Once your'e done up-dating you need to boot your System using your old Kernel Binary - enter "/back_up -v" therefore on the bootprompt.
If you want to continue using your old Kernel, you should install back, old system.kext & seatbel.kext from your Extensions Backup to avoid problems.

Good Luck!