How can I generate keypairs offline and not on a modern OS?

[plorph]

I basically am asking for another type of mycelium entropy because they are all sold out. I love the idea of sticking a flash drive into a printer and printing off some paper wallets. I don't quite trust modern operating systems to use a web based generator such as bitaddress.org despite it being client side. What is the safest way to generate cold storage paper wallets I can stash my bitcoins away and be confident that the private keys aren't left somewhere on a device that can be stolen?

[franky1]

go to bitaddress.org.. save page to file.. put on memory stick

put memory stick into a offline computer that will never go online again.

print out addresses

 if paranoid that somehow it might save privkey to stick
delete file on memory stick (it doesnt save privkeys ... but if your paranoid, you will worry anyway)

without paranoia and is possible:
also delete the printers memory too.. yes your printer does retain data of every page it prints..

[plorph]

go to bitaddress.org.. save page to file.. put on memory stick

put memory stick into a offline computer that will never go online again.

print out addresses

 if paranoid that somehow it might save privkey to stick
delete file on memory stick (it doesnt save privkeys ... but if your paranoid, you will worry anyway)

without paranoia and is possible:
also delete the printers memory too.. yes your printer does retain data of every page it prints..

noted, thanks.
Still curious though, is there another kind of flash drive paper wallet generator like mycelium entropy?