[j-nsp] AS path rewriting (remove one AS)

[Cougar]

Hi,

One (AS1) customer asked me could I eliminate our AS (AS2) from AS path 
that they get from us. Topology something like this:

AS1 --- AS2 --- AS3 --- AS4 ...

Currently they get prefixes with AS path "AS2 AS3 AS4 ..." but they would 
like to see "AS3 AS4 ..." ie it should look like they are directly 
connected with AS3 and not via us. Is it possible to do and if yes then 
who should remove AS2 from this path? We (AS2) or customer (AS1) itself?

I heard that it is possible with quagga to do that (transparent-as) but is 
it possible with Junos? Haven't found anything so far..

---
Cougar