Oh yes.. you can use SOLDIMIX...

Its a joke.. You can create one clip in any format that you like in the "Produce" tab or burn in "Create Disk". specifically how do you whant to "glu-it"?

First, go to your user account and assign yourself a user name. It is required before we can really help you very much. __________________________________
CORNBLOSSOM

I want to fuse them without producing.

You can glue, merge or "Combine" two or more clips back together, if you previously have “Split” the clip. I think you can’t combine two or more clips of different video source, so you must produce a new video file in order to glue it together. Also you cant “combine” a “trimmed” clip, no matter if is the same video clip.

To Split clip, right click the clip in the time line and select “Split” from the popup. If you would like to merge them back again, select “Combine”

I think is pretty much the answer and I hope it will help you,

Regards,
Nicolas