I wouldn't use a interneted computer unless I have to..
This seems perfect though.. I will post up a guide on my site when I get a chance
For now, check out my other guides such as How to create offline wallet with Electrum Bitcoin Client and broadcast transactions and How to create bitcoin paper wallet tutorial.
If you need other guides then ask me via message and if it is within my abilities then I will certainly try to make a guide
also, can you please release sig file or MD5 hash so we can verify that the file we receive/download is authentic and from you?