Thanks for mentioning these programs.
I've heard of PalmFiction and I think I tried it on my Clie, it was terribly slow if I remember correctly. I will give it another try.
I will also try LionDoc, haven't of this one before. Looks interesting, but I didn't like CSpotRun - though I can't remember why

.
Edit: Back from trying out.
PalmFiction needs PalmOS 3.5, but I'm at my PalmV at the moment. Also, it is way too large for my taste, about 4x Weasel.
LionDoc doesn't recognize my zTxTs.