Open Source Document Management System | OpenKM

A newbie here!

Basically I wish to use OMR to check bubble sheets of my students. First of all, let me know am I on the right track? Can I do that?

Assuming I can, how can I design the template? The template requires 1 unique ascii character for each field.
Now I'll have 26 lower case letters + 26 upper case letters (Am I right?) + 32 symbols.
What can I do If I require more fields, say if I have 100 questions in a bubble sheet.

Also can I compile all the scores from all answer sheets and compile them in a single file?

Please guide me!

There's a limit of number of rows and colums per page. If you do not got enought with on page, should separate questions in two or more pages.