The Oct CTP was build 5231 also. there was a leaked version that came out before it was released to MSDN. The Oct CTP had a build date of 10042005 while the leaked version had a build date of 09182005. The leaked version was the winmain while hte one released was the IDX. So yes they were 2 seperate versions of the same build.
The leaked Winmain build was a nuked ISO that someone got thier hands on and manually patched it. It installed but had lots of problems. while the IDX was offically released it didnt have as many problems. It did have a few problems but not as many as the leaked version.
The leaked Winmain build was a nuked ISO that someone got thier hands on and manually patched it. It installed but had lots of problems. while the IDX was offically released it didnt have as many problems. It did have a few problems but not as many as the leaked version.