I grew up listening to Zapp and Roger and they are one of my all time fav. bands. My cousin was real cool with Larry Troutman and actually took me to a Zapp concert back when i was a little kid. I got to meet all of them including Roger but i was so young i didn't even think that i would someday grow up to love this mans music. My cousin even gave me a Zapp IV promo poster autographed by all the members that he had put away with some other Zapp memorabilia that he still has. I framed that muthafucka up and it's in my studio right now.
But yeah if you wanna build your own talkbox hit me up and i will give you the diagram on how to build it and i will give you the codes so you can input the Roger patch into your keyboard. I think i might make a thread in the Art Of War section on Talkbox 101. There is so many different sounds, pitches, and styles you can get on a talkbox. It all depends on the talkbox you use, keyboard, patch, etc. I alone have 4 different talkboxes that i use for different tracks. If you are really interested in learning to talkbox, i suggest you get yourself a DX100 and a Rocktron Banshee. It's the best way to go. Just to show the things you can do with the talkbox, i was bored the other day and did a quick More Bounce remix. Check it out in the link below.
http://www.zshare.net/audio/3209803d2af94a/