remove software not in add/remove apps

how do you remove software that is not in the add/remove programs applet?

...i installed a trial version of WinDVD_Media_Center, but now want to delete it. there was no uninstall option in the menu so i had to remove from control panel.
after i removed it, it was still there (the same icon but different name: IWMC....something like that)....so when i tried to remove that it said that a file was missing....strange thing is that it removed the program from the list.

However, the shortcut on my desktop still works and it is still in Program Files.
i tried to delete it from the program file menu but it says that it is write-protected, so after removing the read-only option i tried again.

it said that (some .dll) file was write-protected...

i tried installing the software again and deleting it, but still no luck.

is there an easy way to delete this program?

 

well, i went into safe mode and deleted it from the program files folder.

thing is, when i insert a dvd when the options for what programs i want to open the dvd with, the program still appears in the list.
im assuming that it can be fixed in the registry, but dont know where to look.
any suggestions?

 

it says requires SP1. i have SP2

 

thanks.
i managed to remove it from the autoplay list (when insert a DVD), but cannot delete from the list of handlers. The delete button is greyd out.