Am I understanding that the information you have found is via gedcom from the internet? Then you want to create a gedcom, in turn, to put up on your site?
Any time you take in someone else's information in gedcom form, I would suggest starting a new project (SEPARATE) from your others, work with it, and when (and if) you get to the point of combining, then you can merge the information. You can not "filter" the information when you import a gedcom. You can choose not to include them from your program when creating your web page; but I'm quite sure think that option is not available to you if you are still using version 1.0. Probably you will have to "group" the living and select those not to include if that is what you are wanting to do. I'm pretty leary of accepting any ole' gedcom from people. Lots of information out there that can mislead a person if there isn't GOOD documentation. Wish you best of luck!