Unable to reinstall Exchange 2007

I am setting up a new Exchange 2007 server on Windows 2008. I screwed up the OWA (deleted the default website) and after compounding more and more changes I decided to wipe the slate clean i.e. uninstall all roles and reinstall everything.

But I could not remove/uninstall Exchange 2007 so I ended up :
1. Deleting the Exchange folder in Program Files,
2. Deleting registry folders of Exchange 2007,
3. Remove roles for Web server, DNS and Active Directory and re adding these roles back,
4. But when I try to install Exchange, the first four options are greyed out i.e. only apply Exchange SP 1 left.

In Control Panel add/remove programs, Exchange 2007 has been removed as Windows says it was corrupted.

Any suggestions on removing Exchange 2007 from  the server? These steps have been tried:
- Running Exchange setup to remove
- Control panel add/remove programs
- deleting the Exchange 2007 folder in program files
- deleting registry folders of exchange 2007

Thanks
sidartraAsked:
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sidartraConnect With a Mentor Author Commented:
Sorry, I think I am really over worked. Step 4 IS the install option for Exchange server (not just Exchange SP1)
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LLMorrissonConnect With a Mentor Commented:
What else is the server doing? At this point my recommendation would be to reinstall the OS, if practical to ensure a nice clean base for the Exchange reinstallation. You could probably have hat done in less time that it takes to figure out the best way to move forward from here some other way.
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sidartraAuthor Commented:
Hi,

1. LLM -  Reinstalling OS - Yup, but now I am working over the weekend so I am not in the data center to insert the Win 2008 DVD.

2. Elisys - I tried all the steps on the web page where applicable, but when I run Exchange, options 1 to 3 is still greyed out. (option 4 is to install Exchange SP1).

Any other suggestions welcomed.

Thanks.
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AgrippaSenior IT ConsultantCommented:
Ok, no problem, maybe it should state Exchange with SP1 instead of Exchange SP1. Have a nice day!
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sidartraAuthor Commented:
Sys Admin error!
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