How to PREVENT htaccess hack in ASP on Microsoft server?

[iman021]

Friends,We've gone through htaccess hacks of a few of our clients sites over the past two days. Excecpt for all of the sites being on Microsoft servers, none of the sites share commonalities: most of the sites are in Classic ASP, one in .aspx, some have Flash, some have jQuery, most are "older" sites, yet one is just 90 days old; most are on one shared server, yet one of the sites is on GoDaddy and another on XO; some have CMS, a few do not; a couple with "easier" FTP and others Four different developers."Fixing" the sites and getting them back up has been easy, but a couple quickly went back, but how do we PREVENT this? All the sites get an htaccess file and .php file dropped in the root. A "scripts" folder and a "demo" folder also gets dropped in.Thanks very much in advance.