Apple script for emailing multiple accounts in Mac Mail

.scpt

set {firstName, eAddress} to getData()

repeat with i from 1 to count firstName
	tell application "Mail"
		activate
		set mymail to make new outgoing message at the beginning of outgoing messages with properties {subject:"Great new! We are now offering Radio Mobile Apps for Android and iOS here at Internet Radio Cast on VPS"}
		tell mymail
			make new to recipient at beginning of to recipients with properties {address:item i of eAddress}
			delay 5
			set content to "Hi " & item i of firstName & "

We are excited to inform you guys that we are now offering radio mobile apps for Android and iOS at $69 and $99 respectively for a one time fee only.

Please visit our site for more info! https://www.radiocastvps.com

Thanks,
Ernesto
Internet Radio Cast on VPS
"
			
		end tell
		--show message window (otherwise it's hidden)
		set visible of mymail to true
		--bring Mail to front
		activate
		send mymail
	end tell
end repeat


on getData()
	set colA to {}
	set colB to {}
	tell application "Microsoft Excel"
		
		activate
		tell active sheet
			set lastRow to first row index of (get end (last cell of column 1) direction toward the top)
			
			repeat with i from 3 to lastRow
				set end of colA to (value of range ("A" & i))
				set end of colB to (value of range ("B" & i))
			end repeat
		end tell
	end tell
	
	return {colA, colB}
end getData

Is there a way to have this add an attachment? I have found this works brilliantly except when I try to add an attachment; what I included above "set content" is make new attachment with properties {{file name, "Macintosh HD:User:Desktop:file name)}
but this screws up the rest of the script. any ideas?