I’m assuming you know that you can drag-n-drop in the pad area… Sadly you can’t multi-select in the pad area. Still, a bit easier than cut-n-paste.
§18.6.1 in the manual offers this:
If a multi-selection of samples is dropped onto a pad, new Simplers and chains will be mapped upwards chromatically from this pad, replacing any other samples that may have already been assigned to the pads in question (but, as before, leaving any effects devices alone).
So if you can sort out your desired samples into a folder in the browser, you can then drag them back into a new rack and get them chromatically assigned. Alas, this doesn’t work with Simplers, only samples.