Here is my take on what I understood you are trying to accomplish. The code is long winded on purpose.

All you need to do is copy the code to the Applescript Editor, make any changes you want and save it as an application.


    #
    # STEP 1: locate and confirm zip file exists
    #
    #	This is long winded on purpose. It is meant to save the user some scrolling and 
    #	and a click... Isn't this what computers are for to save time? :)
    #
    
    # Zip file name 
    set zipname to "Deliverable.zip"
    
    # Locate the zip file
    set zippath to POSIX path of (choose folder)
    log zippath
    set qzippath to quoted form of zippath
    log qzippath
    set zipfile to (zippath & zipname)
    set qzipfile to quoted form of (zippath & zipname)
    log qzipfile
    
    # Check for the file... Use either test not both :)
    try
    	# using shell test - case sensetive
    	do shell script "test -f " & qzipfile
    	
    	# using native test - doesn't like quoted forms and case insensetive...
    	POSIX file zipfile as alias
    on error
    	display dialog "ERROR: Zip file was not found at selected folder." as text ¬
    		buttons {"OK"} with icon caution ¬
    		with title "Alert"
    	return
    end try
    
    
    #
    # STEP 2: Zip found. Unzip it
    #
    try
    	# Add " -d Deliverable" at the end to force directory  
    	# unzip -o to force overwrite for testing....
    	do shell script "cd " & qzippath & "; unzip -o " & zipname
    on error eStr
    	display dialog "ERROR: Failed to unzip file. Message returned was, " & ¬
    		return & return & eStr as text ¬
    		buttons {"OK"} with icon caution ¬
    		with title "Unzip Error"
    	return
    end try
    
    
    #
    # STEP 3: Run script 
    #
    set dpath to (zippath & "Deliverable/")
    log dpath
    set qdpath to quoted form of dpath
    log qdpath
    try
    	do shell script "cd " & qdpath & ";  sh ./run.sh"
    on error eStr
    	display dialog "ERROR: Failed to launch script. Message returned was, " & ¬
    		return & return & eStr as text ¬
    		buttons {"OK"} with icon caution ¬
    		with title "Deliverable Script Launch"
    	return
    end try