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Convert long String to large Array

Would someone lend us a helping hand please...........

We're reading an ASCII data file into Mathematica 3.0 on Windows95.  The
data is delimited by spaces and consists of numbers 1-12, repeating 8 
a segment of which follows:

1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3....... This
is "dummy" data, actual data will not be repetitive

The Head is List and its name is nofo.

We would like to take the data and generate a 12x8 array.  

We thought the following would work, but it and various changes have 
not produced the desired result.


The idea was to specify the location within nofo from which to get a
value and also specify the location in the new array to place that

Could someone explain why the above does not produce what we want and 
also suggest some code that will do the job?

Does anyone know of a text with extensive coverage on handling arrays 
with Mathematica?

Thank you very much!!

P.S.....One other issue was just brought to my attention.  What if we
want to extend our new array to make it 15x8, keeping the existing
array  as is, thus each line would look like 1 2 3 4 5 6 7 8 8 9 10 11
12 13 14  15.
In essence, a 3x8 array is tacked onto the right side of our existing 
array.  (Again, we are not looking to generate the numbers: 13,14,15; 
rather to add  a 3x8 array of non repetitive data at some later date.) 
If your solution can be modified to do this, great.  If not, could you
also offer a suggestion on this problem as well.  

Again, thank you for your help.

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