complex md5 salted hash

Hi,
I have a hash which generated with the following formula:
md5($salt + "-" + md5($pass))
for example:
$salt = "blabla'
$pass = "dada"
so the formula will be:
$hash = md5("blabla-" + md5("dada"))

I saw mode 3710, which is md5($salt.md5($pass)), so can I do something like this:
-m 3710 and $hash:blabla-

Thanks.