OK
found a way to remove the XP only patches
1. Create a group "Temp"
2. Create 2 Filters
A. Active OS - Select OS platforms you wish to patch in your environment
B. Inactive OS - Select OS platforms you do not have or are not patching
3. Set filter to inactive OS and copy all filtered patches to temp group
4. Set filter to active OS and view temp group
5. Remove any cross platform patches from group (DO NOT move to "Do Not Scan")
6. Clear filter - The remaining patches in temp folder are only for inactive OS platforms.
7. Move remaining patches to Do Not Scan and clear temp folder
EDIT: Defined "Active OS" and "Inactive OS"; Added some clarification; Added numbers to steps