removing SP2 problems...

Hey guys im back yet again.
i try to follow the steps on this website http://support.microsoft.com/KB/875350
when i cant find Sp2 on my add remove list so i try

Use the hidden $NtServicePackUninstall$ folder
I get this message..
c:\windows\$NtServicePackUninstall$\spuninst\spuninst.exe refers to a location that is unavailable. It could be on a hard drive this computer or a network. Check to make sure that the disc is properly inserted or you are connected to the internet or your network and then try again.

and the system restore is all out of wack

Please help