i looked at the size of the presets, the presets file size with samples is much bigger. an indication that they are stored within the patch. i have at this time only my laptop, will try it out when i am back to my studio, if they load without the correct path to a sample, or that sample is simply missing on my system.
EDIT: one of the patches on my laptop uses a sample, located an the external harddrive, which isn't connected. and it loaded, with sample. also changing the name of the sample directory on the internal drive, where one sample is located..., the patches that use that sample will also load..
the answer seems to be: included, nice, makes things easier, to share.