why use

 if ($1 == xadd) { msg x adduser # = $+ $2 $3 $4- | HALT } 

just use

 if ($1 == xadd) { msg x adduser # = $+ $2- | HALT } 

also here

if ($1 == xrem) { msg x remuser # = $+ $2 $3- $4- | HALT }

ugh $2 $3- $4-

what u trying to achieve XD?

once again $2- will do XD