What graphics card did you add to it? Would be cheap to go from DVI-I to VGA with an adapter.
btw I am sure the N54L comes with an on-board VGA port...
If you need a cheap USB sound card and aren't to worried about quality check out something like this http://www.extremepcs.co.za/index.php?main_page=product_info&products_id=175
Mainly Youtube videos and odd videos that come via email.
My dad and kids mainly will use this pc.