[amibroker] Import thousands acsii files

[bradjeng]

I try to import thounds of ascii files to Amibroker by JScript.
(http://www.amibroker.com/docs/ab302.html)
It works but very slow.

Is there any quicker way to batch import ascii files ?
Or can I write data directly to the Amibroker's data file ? (what's the data 
format ?)

Thanks !!