Copying A Sliced / Trimmed Sample

I'm not sure if this is a feature of the MPC 1000 but I'm using JJOS XL and can't seem to find out how to copy part of a sample and paste it either at the beginning or end of a sample in trim mode. For example, if I rip part of a song from vinyl that has a snare. I want to copy the section that has that snare and then paste it so the snare hits twice in the same sample.

I know I can obviously overdub and trigger the snare in it's own sample twice. I'm just wondering if this is possible where I can do it on the same sample rather than creating two different samples.

Hi ,
Late answer +" out of OS"
This feature is available on the OS3 : you can select a part of your sample and paste your selection to the end of the sample or, if I remember correctly, wherever you want.

Have a nice day !