:X:string::UseTemplate("string")

UseTemplate(Filename) {
    bak := ClipboardAll
    Clipboard := ""
    FileRead CLipboard, % "D:\AHKTemplates\" Filename ".txt"
    ClipWait 1
    if (ErrorLevel) {
        MsgBox 0x10, Error, Couldn't set template text.
    } else {
        Send ^v
        Sleep 100
    }
    Clipboard := bak
}