GeoCache Puzzle A little help?

[brewha]

I've been geocaching for about a year now. I've gotten all the easy caches in my area. After reading THIS (http://boards.straightdope.com/sdmb/showthread.php?t=475100) thread, I've been inspired to tackle some puzzle caches.

In my area, there is a few Sudoku related puzzles - no problem there.

There was a morse code/rail fence cipher puzzle - a little tricky but I got it.

There was a Navajo 'WindTalker' code - Easy once I found a translation.

But now there's this one.

AenteiUhnmlcinltsur (http://www.geocaching.com/seek/cache_details.aspx?guid=b4403424-f1f5-4e4b-9a1e-7b5dc140f048)

I don't even know where to start. I guess I should be doing some type of addition or subtraction? WTF? I'm sure I'm missing something obvious, but what?

Anyone know how to solve this one?

[Robot Arm]

The first one unscrambles to "sixtythree - sixtyone", so A = 2.

[brewha]

There's what was screwing me up. I was thinking numbers - but I knew there wasn't a y in any number. The longer ones probably have the word hundred in them.

Thanks for a push in the right direction. I think I can figure it out from here.

[brewha]

fourteen + seven = E

Zero + one = H

Ah - it's almost too easy.

[brewha]

Well, I've got em all except for G and I&J.

I think I've wasted enough work time on this for now. I'll have to work on it later.

But if anyone can figure out the big ones, I'm certainly not against cheating!

[brewha]

I've gotten them all figured out - mostly. Here's the last puzzle
RdhrofitntioyhteeeeyuutdnytfonearrhfrifduoudwwndUgeeifrgndohoohfnevtefasedthsthvodnyedntdtihnus


Which unscrambles to

Thousand
Thousand
Hundred
hundred
hundred
hundred
eight
eight
forty
forty
two
two
one
one
fifty
fifty
five
seven

which could be
148,257-148,255= 2
248,157-248,155=2
842,157-842,155=2
841,257-841,255=2
but that's one number for two letters.
is it I=0, J=2?
Is it I=2, J=2?
or, is it not two?
142,855-142,758= 97
Perfect! I=9, J=7 right? nope!
plus the spaces to work. there should be 48 numbers in the first word and 47 in the second. there's two odd numbers that don't have a pair - five and seven. There's one more letter in 'seven' than there is in 'five'. So logic says that 7 should be in the first part and 5 in the second.

I put all the numbers in to check the coords and I just can't get it to work.

any other thoughts?