Shell Programming and Scripting

Hi,
I have a requriement where in I need to install a s/w by executing the installable file through a script. The script currently contains the path of the installable file. I need to now update the script accordingly such tht it identifies the location of the installable file automatically and executes it.... I need to make the script path independent...

Can anyone pls help with regard to this.....

Thanks....

If the installable file can be identified accurately by name only -
you really should have a checksum for it as well.

Code:

#!/bin/ksh
# i made up the checksum value :)  i'm using md5 - you can use cksum or whatever
mychecksum="2d786401096622f33b2cbed35c1bee39"  
file_to_execute=$(find / -type f  -user root -name install_file)
thischecksum=$(md5 $file_to_execute)

if [[ "$thischecksum" = "$mychecksum" ]] ; then
   $file_to_execute parm1 parm2 
else
   echo "no valid file found"
fi