Its not going to matter whether you apply while you're an LPN or not. I HIGHLY recommend applying to take the IL boards. They are notoriously slow at endorsing licenses. The only reason mine only took a week is b/c my recruiter knew someone down there and got in contact w/them and pulled some strings. Otherwise it would have probably been a nightmare, seeing as how my app. sat for a week. I had a friend who applied and it took over a month before hers was processed. Had I known what a headache it was I would've paid an extra $200 to take the IL boards (I had already sent everything into IN when I got my job offer). Plus IL requires so much more for their application as you must get fingerprints done and if you are being endorsed you must pay a fee for them to look you up on the NURSYS database. I cannot stress enough how much easier it would be to just take the IL state boards. Good luck in nursing school