Hi Punkin,
there is CW version for 55xx with flash programmer nor debugger.
As a suggestion, build a dummy project from the stationery wizard, set the Lauterbach ICE as external debugger, using that configuration you should be close to what you had in CW HC12. The Lauterbach flash programmer tool should provide you some configuration file for the specific board you are targeting, specify the binary file to be flashed and you should be good to go.
Hope this helps...
Best Regards