For UOGateway:
Install it
Run it
Select "New Local Server"
You only need to put in a name and an IP/port, nothing else.
Encryption should be "Remove Encryption" by default.
Hit Save Settings.
Now your server name appears. Double click it and try logging in.
For UORice:
Run the program.
It will automatically create a new client using client.exe in your UO Install path. The new client will be in the install path named No_Crypt_Client2D.exe
Use the no_crypt to run UO and log into your server.
Note: clients 4.0.0e and newer do not like the uoclient.cfg setting EnableControlFlowPackets enabled, and causes login to fail. No way around this it seems.
Check your uoclient.cfg for that option. If you're using a client higher than 4.0.0d remove that option!