Hi Nancy
Unfortunately Corel does not officially support that old of a version. So, patches get taken down after a while. They currently support v11+. I can imagine you would be having problems with 7+ year old software.
I will give you my two cents (which may be incorrect as this product pre-dates me). Typically, you would need to install SP1 before SP2, but in some cases both may have been bundled together. It should tell you if that is the case when you try to install SP2. I believe 10 went to SP4.
If you are running v10 on a newer OS like Vista you will experience issues as the application was built years before the OS was conceived.
I hope that helps. Sorry, I could not be more. WordPerfect Universe is another great resource for this type of question.
Regards,
Jay