wiring multiple sets of speakers

I have installed a 2 amp Zapco stereo with a PX  equalizer and a panasonic deh7900 deck. I have 4 midrange MB Quart & 4 MB Quart tweeters that the box says are 4 ohm. When I run the ohm calculator should I include the tweeters in assessing the true ohm load? this comes out at .5  If I exclude the tweeters it comes out a 1 ohm. Problem is that the amp (running all 8 speakers) is blowing fuses at high volumn.  The Zapco amp wants a 4 ohm load. If I run in series on the calculator, all 8 speakers come to 32 ohm. So must I include the tweeters in the calcs & if so could I run the speakers in series or is that too much resistance?

The system is wired as follows: 200 amp to woofers, 150 to mid's & tweet's.

2003 GMC 1500HD truck

Thanks for any help

Brett

Yes that is correct 2 amps @ 2 channels each....I have 2 sets of quarts (8 total - you guessed correct) yes they came as sets mounting either coaxial or separete but using the same crossovers.I am using one amp for mids/tweets & one for the subs as you guessed also. So according to your post, I'll need to get another amp for the subwoofers, I can't really change out the mid/tweets at this time & since they are 4 ohm....I'll have to use another amp for the subs.

Will I have a problem with the one amp (200 watt) & other amp (150 watt) when hookingthem up to either channel? Volumn issue being louder on one side than the other?

thanks again

Brett

or I guess I could run the front doors on the 200 & the back doors on the 150 eh? that should work ok?