Calling a script from any directory

Hi, I am a newbie in scripting and would appreciate your help...
I have a shell script under a filesystem /softtoys/bunny/192.293.32.146/bbdp/bin

script is called bluebunny.sh

When I run the script from under the above mentioned filesystem, the script works fine.

I want the script to be portable enough that I can call it from the home directory, which is /privatedir/trus

I read some tips in relative path etc. but don't understand all this too much. I am still an intern and learning. Please guide...

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