Here is what I would suggest as a complete and fairly idiot-proof guide to exporting consolidated .wav files from FL...I just modified yours. It's a bit long-winded, but that's how I roll:
Edit: The sends are just going to be additional files created with the other mixer tracks. If not used they will be .wav files the length of the song but empty silence/no signal...
1. Assign each instrument or sound channel from the step sequencer to a mixer track.
-Do this by opening each channel window in the step sequencer and in the upper right corner of the window, change the box labeled "FX" to whatever number mixer track you want to route it to.
2. Re-name each mixer track according to the sound it's playing back.
-NOTE: If you are layering sounds to create a single new sound, route all of those sounds to the same mixer track. Ex: I am using 3 different kick drum samples to make 1 new kick. I want to route all 3 sampler channels to mixer track 1.
3. Put the project in SONG MODE.
4. Clear any region you have set or selected in the playlist. Make sure the play marker is set at the beginning of the song (0:00:00).
5. Disable any inserts or effects you may have put on the individual mixer tracks.
-Just muting them by clicking the green light next to each insert is fine, you don't have to remove the plug-ins. You should ask the person you are giving the files to what they would prefer in terms of fx on your individual tracks, they may not want all fx removed.
-(Optional) From the File menu, select "Save As..." and save a new project file that is all ready to be consolidated. This is helpful because you may need the original beat to modify, but having a project file ready to export again if needed saves time.
6. From the File menu, select "Export", then "Wave file...". Select the location where you want the .wav files created. It helps to create a new folder for each project consolidated.
-Naming the base file "[the name of your song]" will help to organize the exported files by grouping them by your song's title. For example, the Drums track would be called "[the name of your song]_Drums.wav", the Bass would be called "[the name of your song]_Bass.wav", etc.
7. Specify the bit depth of the file: 16-bit or 24-bit. Again, ask the person you are giving the files to what they would prefer, both are common.
8. Ensure "Split Mixer Tracks" is selected, and export as wav or aif files.
-FL may render some unused mixer tracks that are the length of the song but contain no data. They waste hard drive space and should be deleted. It is important to name your mixer tracks correctly (see #2) to keep track of which files you need and don't need.
-Some people prefer to edit the filenames after they are rendered to eliminate the "[name of your song]" portion of the filename. This is because in some DAWs, only the first few letters of the filename are visible at times, so when they are all named "[name of your song]_Drums", etc. they all appear to have the same name and become hard to tell apart...
I think that's it. You can use some or all of that on your site if you want. I probably went into too much detail.

*redeyes*
Peace!