One way to get rid of the registry entries would be to have the OCXs/DLLs remove themselves. Here's how to do that.
1./ Locate the OCX/DLL file on your harddrive - usually in your WINDOWS\system32 directory.
2./ In the Start menu click on Run... Type "regsvr32 /u " (without the quotes of course.
3./ Drag&Drop the OCX or DLL into the Run window. It should now read something like "regsvr32 /u C:\WINDOWS\system32\blabla.OCX"
4./ Hit Enter. If everything goes well a message should appear saying that the file was unregistered successfully.
5./ Repeat for the other files.
6./ Check your registry, if all the entries where removed completely.
7./ If you feel really courageous, delete the OCX/DLL files from your harddisk.
Let me know if you are having problems,
Stoepsel
Edit: Typos