Correct url of eml records

it works! thanks!
just to wrap that up for anyone interested, the code below modifies the url of .eml files (in a quick & dirty way) so that they open in the default OS mail app:

on performSmartRule(theRecords)
	tell application id "DNtp"
		repeat with theRecord in theRecords
			set myURL to URL of theRecord as string
			set mystring to text item 2 of my splittext(myURL, "%3C") as string
			set mystring to "message:%3C" & mystring
			set URL of theRecord to mystring
		end repeat
	end tell
end performSmartRule

on splittext(theText, theDelimiter)
	set AppleScript's text item delimiters to theDelimiter
	set theTextItems to every text item of theText
	set AppleScript's text item delimiters to ""
	return theTextItems
end splittext