Another "Please help me" thread
Hi, first of all I'm new here and I'm a complete noob/ignorant, my English is not going to be great and I might have infringed some rule/s with the title of this thread, but I just couldn't think of a better title.
I know you're going to tell me I should've read guides, tutorials, etc, but all this is very new and complicated to me, I'm sorry. I'd appreciate a lot some help, some tips.
The problem seems simple at first: My girlfriend just bought a used HTC HD2 (my idea..), because that's exactly what I did some months ago (with a great success). My idea was to flash
TyphooN CyanogenMod 7 on it, because it's the ROM I use and it works very well. The problem is: This used HD2 had already been flashed and it has
this ROM running (Tonofu HD 1.3). When I flashed mine I used the PC program "Easy Android" so it was very easy, whereas this one already has Android, MAGLDR 1.13 and all that stuff, so it's not like doing it from the beginning, from the factory-state. Know what I mean? I don't know how to do it from this point.
We downloaded the app ROM Manager but when we tap on "Flash ClockworkMod Recovery" it asks us to "Confirm Phone Model" and only HTC Desire appears in that list.
So I said, OK, let's try install ClockworkMod manually (because it's not installed, it seems). And here comes the BIG problem, neither the laptop nor the PC recognize the phone through the USB cable. We tried on both computers, all the ports... and nothing, absolutely nothing appears on the screen. So, of course, when we got into MAGLDR and chose the USB Mass Storage option (so we could install CWM manually) we couldn't do it.
So... how could I install the ROM I want when the phone has already a ROM running? How could I do that without connecting the phone to a computer through USB? Or do you know what might be causing this USB problem? Would a factory reset fix this USB issue? Would it be easier to install the ROM after a factory reset?
A lot of questions, I know... but I need help... I don't have a lot of time...

Thank you.