1. Yes, when you are ready to paste just go to Prefs->Copy/Paste then select the paste as Sample choice bar, then press the Pasteboard button on the left. It will now show up in the sample list when you are importing samples in the new instrument.

2. Length for a non looped sample is up to you and how you think you'll be playing it. Eg how long do expect to ever want to hold it.

3. It depends on the sound, with synthy ones you can get away with fewer, I'd say no less than 2 notes per octave (C and F# for instance) throughout the whole range you want to play. If you want you can do 3 notes per octave (C, E, G#) that will sound good too.

Thanks for these tips. I've been pulling in wavform samples from the advendturekid set with success. However, I'd like to sample some synths from Sunrizer, and create some other instruments with sample sets I have. Problem is: I can't figure out to add multiple samples (ie. for each octave) and have them triggered at different octaves. Any advice? Is something I need to do through the XML/.flot method on my PC?

Thanks

So, in the Create Instrument screen where you import the samples, they will show up in the list. Select one and it goes to a sample editing page, where you can set various properties including the base note that sample represents. Pick the note and octave (and fine tuning) near the bottom of that page. Do the same for each sample. As you make changes you should be able to test it right away in the play area on the right side of the screen.