Given this script how can I append "xxx" to the filename?

I found this code for resizing images. It works as a droplet (save as app.) I set the code to resize image to “200” and pre-pend “200_” to the new file name. It works great. However, rather than prepend “200_” I’d rather have the script add the size to the end of the name. Assuming original name of file is “image.jpg” I want the new resized image to be saved with the name of “image_200.jpg.” Can someone please help?

on open some_items
	repeat with this_item in some_items
		try
			rescale_and_save(this_item)
		end try
	end repeat
end open

to rescale_and_save(this_item)
	tell application "Image Events"
		launch
		set the target_width to 200
		-- open the image file
		set this_image to open this_item
		
		set typ to this_image's file type
		
		copy dimensions of this_image to {current_width, current_height}
		if current_width is greater than current_height then
			scale this_image to size target_width
		else
			-- figure out new height
			-- y2 = (y1 * x2) / x1
			set the new_height to (current_height * target_width) / current_width
			scale this_image to size new_height
		end if
		
		tell application "Finder" to set new_item to ¬
			(container of this_item as string) & "_200" & (name of this_item)
		save this_image in new_item as typ
	end tell
	
end rescale_and_save

You may try :

on open some_items
	repeat with this_item in some_items
		try
			rescale_and_save(this_item)
		end try
	end repeat
end open

to rescale_and_save(this_item)
	tell application "Image Events"
		launch
		set the target_width to 200
		-- open the image file
		set this_image to open this_item
		
		set typ to this_image's file type
		
		copy dimensions of this_image to {current_width, current_height}
		if current_width is greater than current_height then
			scale this_image to size target_width
		else
			-- figure out new height
			-- y2 = (y1 * x2) / x1
			set the new_height to (current_height * target_width) / current_width
			scale this_image to size new_height
		end if
		
		tell application "Finder"
			set theFolder to (container of this_item as string)
			set oldName to (name of this_item)
		end tell
		# Split the name upon the period(s)
		set asList to my decoupe(theName, ".")
		# Drop the name extension
		set bareName to my recolle(items 1 thru -2 of asList, ".")
		# Build the new pathname
		set new_item to theFolder & ":" & bareName & "_200" & "." & asList's item -1
		
		save this_image in new_item as typ
	end tell
	
end rescale_and_save

#=====

on decoupe(t, d)
	local oTIDs, l
	set {oTIDs, AppleScript's text item delimiters} to {AppleScript's text item delimiters, d}
	set l to text items of t
	set AppleScript's text item delimiters to oTIDs
	return l
end decoupe

#=====

on recolle(l, d)
	local oTIDs, t
	set {oTIDs, AppleScript's text item delimiters} to {AppleScript's text item delimiters, d}
	set t to l as text
	set AppleScript's text item delimiters to oTIDs
	return t
end recolle

#=====

Yvan KOENIG (VALLAURIS, France) jeudi 25 juin 2015 15:38:47