To verify that the software is being installed, go back to the Project's page, and search for one of the Compute Nodes in the list that you have supplied software to.
Click on it to access its main page.
In the Supplied Software list at the bottom of the page, you should now see all of the software releases you have selected for supplying, along with a grey status box displaying Installation or Building.
You can immediately start requesting an instance of the software on the Compute Node, but you will need to wait until the status box becomes green and displays Available in order for the instance to be correctly and fully deployed.