cntlm to access a ISA server

I use cntlm to access a ISA server at work. In order to get the hashed password working, I had to write it in plain text in the file under Password first, run cntlm -H, and then set the hash under PassNTLMv2 in the config file. I configured firefox to use 127.0.0.1:3128 as a proxy, but had to add intranet and localhost addresses in the exception fields. I could use tsocks to make it transparent for proxy unaware apps but not tested yet... Possible to set the http_proxy and https_proxy env variables for proxy aware apps (Mandriva allows to set this from mcc)