awk script help needed

hi frnds,
im writing a script in awk that will auto generate files that will have 5 fields and 10 lines each( filenames cud be file1,file2 etc).. Is it possible to initialize NF to 5 and NR to 10 in the BEGIN clause by just assigning them these values???????
The awk script will populate each of the 5 fields with data and store this in the files generated.
What is the way of outputting data in a file( eg if i have a file , data.txt how do I output the data into this file using awk script???)