Picaxe Chip and PWM

Well I finally got a ship I can understand...a Picaxe 28X...or a MicroChip PIC16F873A-I/SP modified to be programmed with BASIC. I've been working around with it and am trying to run a motor for a roller coaster launch. I set up the launch rig as it will be for the model. I then tested the motor to see the current at this load. It peaks at 8 amps for a split second and then jumps down to almost 4 amps. I was going to use the NMIH-0050 H-Bridge, capable of 5 A continuous and 6 A max. Will this quick 8 amp spike hurt the h-bridge? Any h-bridge out there better for my application? It has to run forward at full speed, and backwards at low speed...hence PWM will be used.

make your own H bridge with mosfets. google (and internet) is full of them...

Yea, been trying that, but there is so much info out there...really blowing my mind. I think I found plans for one I like, hopefully.
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With the National DS0026

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