When you install Windows 7 you will always get Ultimate edition, have you wondered where the other editions are and choose which one that fits your needs? You already got them!
First look in my previous post how to install from a USB stick
Fire up the Sources folder from the USB stick and delete the file Ei.cfg
Done, now you are now able to choose which edition to install.
Please note that your license key works for Ultimate edition only and if you want to try the edition for more than 30 days, you can extend the activation time 3 times
Open a command prompt with administrative privileges and run “slmgr -rearm”
DeployWindows 