Creating and Adding to CS group

Hi, I'm new to creating custom scenery and I wanted to know if it is possible to create a custom scenery group and then add more scenery to the group as I get it created?  I've only been successful at installing all the scenery at once.   Need help.

It's been a long time since I made cs for RCT3, but yes, you can add scenery to an existing set. I would add one piece, install it, look at it in the game, and then add another piece, and so on and so on. If you need more help, you can probably get some help at SGW from the players who are still making cs sets.

Thanks shyguy, I'll definitely give it a try.  It's just frustrating having to install a group and then delete it and add the new scenery and then reinstall everything.  Totally Anti-productive.