Complex test build preparation

[alans09]

I'm looking for automatic build releasing and assigning of testcases.
Here is scenario:

1. I get information about new build available
2. I need to: create new build, assign testcase execution to specific platform and person.
3. I have 2 people:
   I need that 1st person will get to test build1 with platform1 and 2nd person wil get to test build3, with that same testcases as person 1 but on platform2

I can't find possibility of doing this by using API. Is there any possibility? Or there is no chance of assigning test execution from API with platform specification?

Thank you