Locked out of only account (W7hpx64)

Hey guys. Well. I managed to lock myself out of the only account on my computer (I had to change the password, and them promptly forgot it). The hidden admin account isn't enabled and i DO NOT have a Windows 7 CD, nor do I have easy access to one. I am simply wondering if there is a way for me to access either my account or (by somehow enabling it) the hidden admin one.

NB: I have also tried several methods of reaching a command prompt window, including starting in safe mode and the like, and I need user-authentication each time =/

Any help would be greatly appreciated. Thanks heaps =)

Well, booting to Win RE would certainly work, but you need a password authentication to get in =(

I have my account, which I don't know the password to, and

"UpdatausUser" and HomeGroupUser$" as my options... If I could get past this step I can do it all through cmd, but I can't.. any ideas?

I've tried the USB boot. I got up to running the syslinux.exe, that worked fine. Not sure what to do next? I plugged the USB into my PC (with those files on it etc) and nothing happened, it wouldn't get past the loading screen. Any tips?

EDIT: I also downloaded he .iso from the CD download, but he Windows 7 USB/DVD Burner kept saying the .iso was invalid D:

ok, I managed to get the CD to work (thanks for that =D). In step 2, where you need to enter the path to the registry, what is it? I have tried system32/config but that doesn't seem to work. You wouldn't happen to know the other common places would you? (My PC came pre-loaded with windows home premium, 64 bit)

AH! I found it. THANK YOU SOOOOOO MUCH. Words cannot express my gratitude. Thanks heaps.