Solved!

The Rule goes like this

On Student, when Register course is Changed

If on Student, Register course contains false

then set the properties of Courses View (configure)

else

then set the properties of Courses View (configure)

Very Easy   Outbound Rules ]

First ... put an Advanced condition... .Radio Buttons ] are kind of buggy on the Yes/No True/False 1/0 so use the advanced condition to see if the Checkbox is True or the specific value you are looking to do. If return True, then call the Outbound Rule.

Once you have everything working the way you expect in the view if the click yes or not. and clear values put the courses.. blah blah blah.

you will have a button to submit... here is the magic. ... like I said Very Easy a Outbound Rules ] . First Execution is Outbound Rule Validation.. Talking with Bryan we came up with a Best Practices approach where all your created Outbound Rules named with the Prefix f Sub Rule - .....] This way you will always know is something you build.

So basically if the Radio Button is Yes... then call the specific Sub Rule Validation Courses or whatever...  on the Sub Rule Validation Courses if the condition not work, make sure you add the Stop Rule Execution to prevent the submit of the form, also put a popup mesg to let people know what is required.

If the Radio Button is No. you will call nother Sub Rule Validation Students and call some other validations with popup mesg and stop rule execution.

The idea is when button submit -> Call Sub Rule Validation if pass the continue so you can submit, start workflow, send email and continue with your process.

Hope this helps, happy K2 Hacking =)