a little advide:

for comments in a script, do

/*
the comments
that you
write in
the script
*/

OR

;The commants 
;that you
;write in
;the script

also, when u do

  /if (!$2) { msg $chan Give my bot a rating 1-10 : 10 being the highest. To do so type !rate ə-10> }
  /elseif ($2) {

no need for elseif ($2), just else {
u also dont need the if !$read, jsut else
and u can use isnum to see if its a num 1-10

if ($2 isnum 1-10) {

also, as acid said, u should consider doing a hash table or an ini, but nice idea