I think what you're after is the FileInstall() function in AutoIt. This allows you to include files in the .exe AutoIt produces and then use them. Here's a cut & paste from the AutoIt help file...
CODE
FileInstall
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Include and install a file with the compiled script.
FileInstall ( "source", "dest" [, flag] )
Parameters
source The source path of the file to compile. This must be a literal string; it cannot be a variable.
dest The destination path of the file with trailing backslash if only the directory is used. This can be a variable.
flag [optional] this flag determines whether to overwrite files if they already exist:
0 = (default) do not overwrite existing files
1 = overwrite existing files
Return Value
Success: Returns 1.
Failure: Returns 0.
Remarks
The FileInstall function is designed to include files into a compiled AutoIt script. These included files can then be "extracted" during execution of the compiled script if the statement is executed. Keep in mind that files such as images can greatly increase the size of a compiled script.
The source file must be a string and not a variable so that the compiler can extract the filename to include. The source cannot contain wildcards.
When this function is used from a non-compiled script, a copy operation is performed instead (to allow for easy testing pre-compilation).
Files maintain their original creation/modification timestamps when installed.