XgSubmit /group=Group1 /caption=Task1-Group1 /command DummyProcess.exe 3000 
XgSubmit /group=Group1  /caption=Task2-Group1 /command DummyProcess.exe 2500
XgSubmit /group=Group1  /caption=Task3-Group1 /command DummyProcess.exe 2500 
xgWait /group=Group1
XgSubmit /group=Group2  /caption=Task4-Group2 /command DummyProcess.exe 3000
XgSubmit /group=Group2  /caption=Task5-Group2 /command DummyProcess.exe 2800
XgSubmit /group=Group2  /caption=Task6-Group2 /command DummyProcess.exe 2000
xgWait /group=Group2