excluding test from overall score

in my title I have two tests. Thing is, the user only gets to try one test depending on an option (one of two) they have selected. There is no way prior that I will know which test they will choose out of the two. I have been testing on my scorm tester. As you would imagine the cmi.core.score.raw only comes out at 50% for if you pass your test with 100%. This is because both tests have obviously been included in the overall score. Don't spose there is any way in lectora (or the publihsed html) to turn off the other test from being included. My proposed solution at the moment is to have like a menu screen and they branch off from there to two separate courses depending on what option they choose. That way, you can get 100%.Any ideas?Thanks.