[quote=DaChew;2066043]According to Microsoft SP3 requires at least SP1 for an inplace upgrade[/quote]They did that deliberatley since XP SP0 is out of support now. Some registry changes help overriding this artificial limitation: http://patch-info.de/artikel/2008/03/15/465 offers a tool called SP3onWindowsXPRTM-Enabler.exe which should do the trick. (Website is German language).
that’s why I asked about slipstreaming, noone I have heard of has tried with a XP sp0 disk yet?
A [U]german source[/U] quotes Chris Keroack from MS as follows:
You can use /integrate to create integrated installs combining SP3 with any previous SP, all the way back to Windows XP RTM/SP0.
In our internal testing, we explicitly test that /integrate of SP3 works with SP0, SP1 and SP2.
As to your other question - as mentioned above, the way to get SP0 + SP3 is to do /integrate. That’s tested and supported. Changing the registry to force SP3 standalone update to install onto SP0, is not supported. I can’t make it any clearer than that.
I know you don’t like that answer. I apologize for your frustration in not getting an answer to what likely seems like a simple theoretical question.