Outlook not working, MAPI32.dll error

I am really pissed off by this problem regarding Outlook, kindly help me out..
When I clicked to start Microsoft Office outlook 2003, I got the following message:


so, I..
1. reinstalled outlook 2003. It dint work
2. uninstalled Office 2003, installed Microsoft Office 2007
3. reinstalled outlook 2003
But still I am seeing that message.
I googled the problem and found out that its a well known problem with a standard solution. As stated by Milly Staples, MVP Outlook, just renaming the file should work, but thats not the case here and with many people. I am infact not able to rename the file. I will give it a try logging into safe mode in sometime.

further when I click on Mail in control panel, I see the following message:


Vista's default program for mailing Windows mail is working fine, but I want outlook. Anybody of any help?
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-Mohsin