you bought a debbuging station to run a cfw on it??? why you just haven't bought a retail unit and put a cfw on it?
to answer your question, it's possible to run cfw on a debug unit. just downgrade to fw 3.55 and from there you can install a cfw like rebug DEX and so on.
what things are you going to mod? you will need target manager and debugger to RTM games.
i wouldn't recommend you to connect to psn, cause they can easily see that you are using a debug unit and 5ony knows who has the permissions to use such a console.