Best way to go about this?

I'm writing a "programmable" robot of sorts, and by programmable I mean the owner would say "forward 3, wait 2, look left, forward 1, turn around, wave" and the robot will walk forward for 3 seconds, wait 2 seconds, turn to it's left, walk forward again for 1 second, turn completely around and then wave.

The animation and movement I can code fine, but it's getting the robot to read the directions and then execute them in proper order that's been giving me a headache. The main problem seems that I am running into stack-heap collision errors with very long sets of commands (a whole chat line worth), and was wondering if I should instead write a seperate script for each command, and then use llMessageLinked to call for each command script when it's needed, or if there isn't some better way to avoid the stack-heap errors. in general I don't like relying on multiple scripts listening for messages as I'm trying to abide by the "less listeners = less lag" rule.

well the way you're inputting the directions, IE: forward 3, stop 2, etc, etc is already a nicely formatted CSV list.

llCSV2List would work nicely here. You may want to do a little data validation to make sure the user chatted the data properly. Then just loop over your list 1 index at a time...