It is convoluted as hell. I have been trying to figure it out for the last hour and a half myself. Best I can figure I will have to deposit funds to Mt.Gox get a voucher to send to btc-e through bitinstant. However when I go to bitinstant they seem to have the option to take btc-e vouchers to send to MT.gox but they don't have the option to send them the other way it is fucked.
Only other way I can think of is if you have bitcoins already fund it that way. But I don't so I am screwed and litecoins will likely be $10 before I can fund the fucking account.