Dear Chimera users,

I have a .psf and multiple .dcd files for a peptide movement and I need to make a movie combining certain frames for each dcd file.  First, I have tried to load more than one dcd file in the MD movie interface but my computer hungs. 

I think I should use a metafile in this situation.
Something like this:
namd(psf/dcd)
pam.psf
pam1.dcd
But I have all the other pam2.dcd, pam3.dcd, etc until 40, each having 3000 frames.
How could I include them in the same metafile to be able to open one, record 20-30 frames, open the second, record some other frames and so on?
And how could I include the frames number?

Thank you in advance,
Clara Blanes