how can i run the "Designer IDE" without run the Lazarus?
You cannot, not easily anyway. The designer integrates with rest of the IDE tightly. You could try to refactor it of course and create an API for the integration.
Other option is to use some external designer component. I don't remember names now.
Another option is to use Lazarus itself after stripping out any extra components and hiding the palette etc.
Build Lazarus with all optimizations and it loads fast and is very snappy.