You can give this a shot as well...

 Code:
$ArchPath = ReadValue("HKLM\software\Lotus\Notes" , "DataPath")+"Archive"
$Name=Split(@FULLNAME)
$Uname = "arch_"+Left($name[0],1)+Left($name[1],5)+".nsf"

$dest= "\\gideon\testarch"
$cmds='"'+$archpath+'" "'+$dest+'" "'+$uname+'"'

Shell 'robocopy '+$cmds