Hi Victor,
Maybe you just need to create a batch file that will run several commands, which will execute all the needed tests. For example, the batch file will have the following contents:
"C:\Program Files\Automated QA\TestExecute 8\bin\TestExecute.exe" "C:\Documents and Settings\Administrator\My Documents\SugarSync Shared Folders\ITeste Files\Scripts\IE8\GenAuto\Auto.pjs" /r /p:Cenario3 /e
"C:\Program Files\Automated QA\TestExecute 8\bin\TestExecute.exe" "C:\Documents and Settings\Administrator\My Documents\SugarSync Shared Folders\ITeste Files\Scripts\IE8\GenAuto\AnotherProjectSuite.pjs" /r /p:AnotherTestProject /e