Java

I have a v3i and there's a 50 song limit on itunes. I tried to get DAP off many sites, but every link i click, i get a pop-up that says "file not found". I was also wondering if dap works when you close your phone. iTunes does, but the reason i want DAP is so i can put as many songs as i want on my phone, and still listen when my phone is closed. If anyone has a link, it would be greatly appreciated. thanks