After I posted I thought maybe I should have just waited to see what you had... but couldn't edit my post. I should really register, lol.
Anyway. Yeah, just send me what you have and we'll go from there. I'll have a look and if something needs fixing I'll just let you know. If not, you'll get them in short order.
For an idea what I'd look at.
64x64 I would assume you've taken the two pixel overlap into account and they'd be ready as is. To convert them I'd use c-pod to do them all at once.
256x64 would be a bad size because (a) they cannot be sliced up so they over lap, so they'd have seams everywhere - converting would probably be best done with traxx, (b) the size should really be multiples of 60 - eg 240x60. To convert them I'd use slice60. Depending what you have, we may be able to combine a couple of these ideas so you don't need to redo anything.
In either case, I'll probably lay them in a track to have a look at how they ccme out. Generally speaking, this is easy stuff so there's no harm if it takes a couple shots before it's right.
BMP and TGA are usually best. High color. I can reduce if it needs it.
It sounds like you already have things done. So, I'll just drop these links in here for future reference.