Changing parameter name of SPs

[Chagh]

hi all,
how can i change the parameters name of my SPs? (not manually be editing the SP).
e.g. i want to change all parameters of all my SPs from the format "var_foo" to "p_foo".

i tried backing up mysql.proc table with mysqldump and change the names in a text editor by replacing "var_" by "p_". but i can not restore it now and it gives me such an error:"ERROR 1064 (42000) at line 1: You have an error in your SQL syntax; check the ma
nual that corresponds to your MySQL server version for the right syntax to use n
ear 'n++
/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */' at line 1"

What is an easy and not-time-consuming way to do this?

Thanks in advance
Chagh