>>>>You can check search the Registry for references to your .ocx, simply by searching on the file name (it's the cheater's method, but it works). Make sure you make no changes to the Registry when you do this - otherwise your machine may become UNBOOTABLE.
>>>
>>>Taking this opportunity, which one is the registry file?
>>
>>The Registry is not a single file - it is a set called hives. *DO NOT* attempt to open any of its components in any way other than using the Registry Editor - the contents will make no sense, and you are likely to toast your operating system.
>

With regedit you can easily create a '.REG' file.

1.Open regedit.
2.Select HKEY_CLASSES_ROOT.
3.Find the OCX reference you check for.
4.Highlite the folder (select it)
5.Select File/Export ...
6.Check the 'selected branch' radio button and give a name to the file
7.Click OK

All infos about the selected branch are saved to the file with the '.REG' extension.
This extention is associate with the registry base.
When you doubleclick on it or run it, the contained infos are added to the registry base.

I'm not sure but i think you can try to run it as post intallation exe.


Hope this help. ;0)