multi mA fixed driver?

ok, after i found out that those little resistors are what controls the mA (atleast on the rckstr fixed driver) i got to thinking... would it be possible to make one that was made up of a bunch of the resistors that add 25mA and just have a pos lead after every one...then hook mit up to a multi switch....then you could just use the switch to increase or decrease by 25 mA at a time?

i was working on adding a small switch to my dilda and using resistors to make it switch between two different currents(stun and kill kinda thing). its all a matter of how much space you have. tiny wiring and soldering can become frustrating fast

yeah i know. i am going to buy some.. and it's only $1.50 for tons of resistors