well hi, I was searchin all over the net and i downloaded a 
lot of programs to work offline, but no way :(. 
but I read a lot of documents about the ISA firewall and I 
found that ISA use something called NTLM AUTHENTICATION??? 
so I download a program called ¨offline explorer pro¨ and 
yes, it´s work because when you uses the proxy settings one 
option is to use the NTLM authentication and you must put 
the user name using DOMAIN\SERVER and the password and the 
program works!!!.
But there is 2 problems, 1) the program is not freeware so 
you must pay before using it 30 days.
2) the big problem is that the program is not so good than 
WINHTTRACK, I give and very good to WINHTTRACK and i give a 
poor to ¨offline explorer pro¨.
Well, the question is: are you thinking about implement the 
NTLM in WINHTTTRACK? and what is NTLM?thanks and sorry for my pooe english.
victor