If you are reading this post, you have more than likely hit the same brick wall as what I did some time ago. Yes, you tried to install MOSS 2007 on Windows Server 2008 without SP1. FAIL!
Microsoft do not allow the installation of MOSS 2007 without SP1 on Windows Server 2008 without the SP1 as a result of a number of known compatibility issues. Good idea, but is still annoying I guess.
Anyway, here are some links that will help you through the process:
- MOSS 2007 with SP1 (Slipstream) OfficeServerwithSP1.exe Released;
- Installing SharePoint Server 2007 on Windows Server 2008 RC1 (manual steps);
- Windows Server 2008 and SharePoint on Technet