>What I am worried about is NT SP6a messing up the other fixes I have installed since I did that one. My install order has been over time
>
>NT4
>SP6a
>IE5
>Option Pack (for PWS, MTS, etc.)
>Office 2000
>SP6a
>MDAC
>MS Java update
>Sun Java runtime environment
>Visual Studio
>Visual Studio SP3
>Office 2000 SP1
>Several Office 2000 hotfixes (how do you uninstall them btw?)
>Visual Studio SP4
>
>And in between I have been to windowsupdate.microsoft.com several times to get lots of fixes. What I suspect is that I will apply SP6a, it will overwrite several hotfixed DLLs from other, later service packs (Office, VS, windowsupdate) but the Registry entries for the hotfixes will show that the hotfixes are still there.....
>

The SP shouldn't overwrite anything that is newer. It should not affect any application service packs, including Java stuff, Office, Visual Studio, etc. Do not reinstall the Option Pack as the SPs fix Option Pack problems.