[otrs] Frontend::Customer::Auth Digest::MD5

Hi, I need to get OTRS (2.4.5) to somehow change the method in Frontend::Customer::Auth to support another option, (not just plain,MD5, crypt) but also support Digest:: MD5, i.e. use Digest::MD5 qw(md5_hex); my testpass=md5_hex("password"); I know in terms of security its less secured, but because of integration from another system who keeps password (in php) with plain MD5, I need to change the way OTRS save/compare customer passwords. Have anyone done it in the past? any thoughts? Best Regards, -sv