This came up in San Marino, where two groups have 2 round robins within their group and then 1 round against teams of the other group. But the game puts those matches on the same week, which is rather unrealistic and makes the season much too short. So is there a way to arrange it that there'd only be one league match per week? When I checked the current San Marino 2008-09 league schedule, there was only one week when there were two matches.
If you need more details, I'll go find them.