To read Kurzweil multi-floppy files in Awave Studio:
Rename the file parts into .KR1 for the first floppy, .KR2 for the second et c. Place all the parts (.KR1, .KR2, et c.) in one and the same directory on your hard disk. Then open the .KR1 file to read them all. When saving files, you must select 'KR1' if you want to save a set of 'split' files (named KR1, KR2 et c). If you want to transfer a file to the Kurzweil on a 'big' medium (e.g. a ZIP drive) then use the normal KRZ file (note that not only the K2000 but also the K2500 and the K2600 can read KRZ files even though they usually use the extension K25 and K26 resp.). If you want to transfer a file bigger than 1.44MB on a floppy then you need the split ones - put each of the KR1 et c files on a floppy disk each and rename them all into .KRZ.
To read 'Native' Kurzweil CD-ROMs in Awave Studio:
I/O → Read from Sampler CD.
'Native' Kurzweil CD-ROMs are formatted in a way that Windows doesn't understand and has been used since the first K2000 model.
Later models can also read standard ISO-9660 formatted CDs - for which you do not need to use this special command (just open them like any other file).