Well for a fact I know my power supply is proprietorial,
but for the Compaq all yo need to do is check a site that sells them and it should give you the information needed for upgrading or check at Compaq.
Well I remember my nerve endings were charged and I released some of that magic blue smoke once.......or maybe twice........can't remember but I do know everyone cleared out and the funny thing is that I'm still functioning, at least I think I am.
If the hard drive is new it should be formatted in the beginning of the windows install, make sure its done. I'm guessing everything is new, I have had CD Rom problems when they were used and the reaction seemed to be the same as your problem. A new drive cured it for me.
Does the new modem have a firewall activated?
My DW7000 never had a firewall but I believe you can have one depending on your plan. Other than that I have had 2 faulty DW7000's and they just didn't work so I believe it to be a network problem.
Welcome to the forum oojdbozoo and to the EVDO section. We have been posting our speed here http://www.testmy.net/forum/index.php?topic=19576.msg231804;topicseen#new