Yes, you can do this with version 6. What you do is create a “Selection” category. Open your Categories window, then: File>New Category>Selection
Name the new category. Then M1 displays a new, empty category. Open the menu and do a search. When you’ve got a set of found songs, you’ll notice the button at the bottom is labeled ‘copy’ instead of ‘move’. Click to select all the songs you want in the new/selection category and move them into it. Now these songs are in TWO categories.
The rotations/plays of the songs in the Selection category will not conflict with the rotations/plays of the same songs in their other/primary category.
In some cases it may be best to create two or three of these Selection categories for your special programming rather than just one because if you have only one, then the songs in it are most naturally going to always schedule in one-two-three rank order. For example, if you have only one Selection category and “Billie Jean” is rank #83 and ”Every Breath You Take” is rank #84. If that is the ONLY category you use on your format clocks, then as long as they remain at those positions they will almost always schedule back to back. You could shuffle the category every week to change the rank order, but that might get several songs of one particular ‘type’ or by one artist bunched up together.
What you could do instead would be to create two or three selection categories and give them a kind of a ‘theme’. Maybe one selection category with all uptempo songs, another with all down tempo, another with all disco-flavored titles and so on. Then as you build your clocks, you’ll have more control over the nuance and flow.
Selection Categories are an advanced function which is not available in the LE version