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.
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It sounds like you already have things done.  So, I'll just drop these links in here for future reference.
http://cownap.com/~mtmg/templates/
http://cownap.com/~mtmg/templates/10templates.html