You're actually opening a whole new song when you do that. I understand you're problem. The only way to do what you're talking about is to copy and paste the second tutorial file (by copying each instruments track and recreating the playlist) into a new pattern slot on the first tutorial. I know that probablyt doesn't make all that much sense, and it might not even work, cause the 2nd tutorial file may have different settings on the instruments. You shouldn't have to buy Beatslicer, I export WAV's all the time and then put them together using Nuendo, and occasionally Wavelab. I am not sure what you're doing exactly that brings up beatslicer. For an example of something I created completely in Fruity Loops and Nuendo check out
http://www.the-smollers.com/whatiget1.mp3
(Now thats a shameless plug) Someones doing the vocal track for that as we speak (i hope).
Importing a WAV you just have to set the directory the program can find the files in. They'll show up in the sample list on the left under trhe directory you set.
Do you understand how the different paterns inside each fruity loops song works? Within each song you have an unlimited amount of patterns. Theres the little telephone-esque pad at the top right that shows the first 9 along with an LED thing that says what number. Maybe you should just skip those tutorial things and delve straight into making your own song. Experiment. PC Drummer may have been a better choice for you, but it is not even close in capabilities. I can maybe help you out on some black metal stuff in fruity loops if you'd like, the singer in my band is huge into black metal. Give me an email and we can discuss that off of the board. Any other questions (i know i probably didn't answer any) keep the post coming.
Jake