I had the same need while moving to our new home. To fix this I added a router which was setup like so.
Netbook w/tethered phone for internet.
ICS and setup to share to the ethernet port.
Router with it's WAN port connected to the netbook's ethernet port.
This is not an offer to detail this further since you must be able to support such a setup but I hope you can use something similar.
I am having a lot of trouble making either of my laptops into a wifi hotspot.
I have read all the guides on google, and they all say the same thing.
When i go to my local area connection properties. I didnt have the authentication tab, i how resolved that now in services.msc.
I follow the steps to the letter...and when i view available network connections from the laptop i am creating the hotspot from. i can see the wireless hotspot. But i cannot connect to the ******. And my phone doesnt see it at all
I have tried disabling firewall and virus/malware programmes. I have downloaded all updates for windows.
I have the same problem on my thinkpad, as well as my dell laptop
Any suggestions, i googled and couldnt find people with problems creating a laptop hotspot. Just how to make one.