yeah, they add to the script editor each version. But I really don't care about that. My money is for cool new nodes, like a new fluids similation based on the level set and implicit geo methods that are big now. You can have maya open and run a script created in any text editor you like.....
these are the commands I use for two separate buttons on my shelf....I got the techique from Dave Gould's books......I use a default script named learning.mel....then saveAs the procedure name when it is finished and I save it out to my user script folder.
// to open my default learning.mel script and use another text editor....textpad in my case.
string $scriptsPath = `internalVar -userScriptDir`;
chdir $scriptsPath;
system( "start C:\\Program Files\\TextPad 4\\TextPad.exe learning.mel" )
// to run script......
source learning;
