XP was actually built from the ground up, it wasn't based on Windows 98. The backbone of it (NTFS) was based on Windows NT, but it is still a completely 'new' OS
To be absolutely accurate XP is based almost entirely on Windows 2000 (the Kernel is virtually identical. The drivers and DLLs are virtually, if not absolutely, identical). But Win 2K was a re-write based on NT4. NT4 was completely new.
All of which has nothing to do with the fact that SS06 works fine. It doesn't need a patch. It ain't never gonna get no patch! (triple negative in one sentence - I win 200 bonus points).
In any case, to upgrade from NT4 to Win2K, from Win2k to X and from XP to Vista, I had to PAY. Support always stops after a while. Even though I have now wiped Vista from every machine we have and gone back to Win2K and XP, I know that support for 2K is reducing. I expect that.
Does someone want to start a new thread so that we can vote:
This thread was started by someone who:
1 - was trying to get a free upgrade
2 - was just yanking our chains
3 - was having a needless whine
4 - all of the above
My vote is for number 4.