Tweeter Box Crossover with Ribbon and Bullet Dome Tweeters

Hello-Im new to forum so bear with me if I seem uninformed-Im working on tweeter box to upgrade frequency response for DVD-A Titles with my current system-Ill be using 2 tweeters per box-1 Realistic Bullet Super tweeters 40-1310 8 ohms, Internal cross-over.-- Freq. response is 5000- 40,000 Hz
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5789408204&category=3276&ssPageName=WDVW&rd=1
and 1 Foster Ribbon Tweeter I found after reference from this site http://www.diyaudio.com/forums/showthread.php?s=&threadid=60405
They were out of stock so googled Foster Ribbon Tweeter and found them here
http://www.allenorgan.com/store/aostore.html
My question is How to best wire them to run from my 8 ohm speaker feeds from amplifier since both are rated at 8 ohms and the Fosters require a 6,4000 HZ crossover-The realistic has a built in crossover.
my box will be simple closed wooden box found here
http://www.dickblick.com/zz604/22/
Ive never built a crossover but I imagine a 2nd order crossover modified for high frequency or just inline capacitors will work -I need details part #s etc.especially on how to link the 2 8ohm so will be compatable with my amp.thanks for any and all help-doccbst
 
Still working on this--anybody ever tried parallel/series combo with 2 8 ohm speakers--it should result with close to 8 ohms--but the calculations are beyond my math skills--Im waiting on digital multimeter to check--cant order caps until determine exact ohm of setup--any help appretiated
 
Almost there!!-recieved all components and assembled(for testing) 1 box--used 2nd order Linkweitz -Reiley equations crossed over at 7450 Hz --ended up with 2 adjustable L-Pads-one after crossover and one for Bullet tweeter--Bobad was correct-the Bullet is a lot louder so attenuation was mandantory here--- even with bullet pointed to rear-also inserted 4 ohm resistor after the 2 paralled tweeters to achieve 8 ohms for box.
So now I have control over volume levels for entire system and can balance individual tweeter levels as well as having 8 ohms to match with other(main) speakers,I can either wire parallel for 4 ohm or series for 16 ohm--will try both to see benefits.
Tested on BoomBox with CD(Whitesnake) and the additional high frequency was very noticible-( clear-not to bright-quite nice actually) from high hats-guitar etc.--
Will test with Bose system tonight with DVD-A (48,000 Hz) and compare to Pyle Pro PHAT6 Piezo tweeters @ 27,000 Hz and fine tune for final assembly.
Will post results and findings later.
Thanks for all assistance-especially Bobad-Cheers