Hi,
Yes, with single stack version, you can do your developments (ESR, ID& testing) using NWDS tool( in addition to conventional Swing based ESR and ID ).
You need to download the correct NWDS version as that of your PO system. There are quite a few blogs / info on working with NWDS tool..to list a few as follows:
Process Integration within Eclipse
Hope it helps
Regards,
Azhar