Katakana Practice

I've been learning Katakana with the Knuckles in China Land game. Very useful. I can't type katakana on either computer, but I can type hiragana on my laptop. Not on that ATM though ^_^. So I'll just give what I've done so far in romanji . I'm using the Katakana names on the Final Fantasy Legends Action figure box belonging to Kefka palazzio.
I'm traanscribing them into romanji fron Katakana.
Kefka: Ke Fu Ka
Leviathan: Ri V A I A Sa N
(V from softened U sound. Assumption, haven't seen it in game yet.)

Ifrit: E Fu Ri (lengthen i) To

Kefuka
Rivaiasan
Efuriito

Anyone familiar with FF: Is this right?

Without knowing for sure, I'd say that's about right.

how would you be able to write hiragana on a computer without being able to write katakana? They're both a part of IME...

Well, I just don't know how. Hy program writes Hiragana/Kanji by default and when shifted types in UpperCase English Letters.

Try typing something in hiragana, then hitting f7; if it's IME, it'll automatically change them to katakana.