hey

can i upload all my aac mp4 songs in the new ipod 2003 using microsoft windows ?

Yeah, you can use programs such as Sveta or Ephpod, these are apps that let you upload
songs to your iPod, regardless the generation of your device, 1st 2nd or 3rd.

http://www.dbpoweramp.com/sveta-portable-audio.htm
http://www.ephpod.com

Using the latest beta build of Foobar2000 V0.7 (beta9) you can even have iTunes compatible
tagging within the MP4's that soon the programs mentioned will support (like the iTunes does
for uploading on the Mac platform)

If using the iPod on a PC, and only on a PC, its perhaps best to format the iPod to FAT32 so no
need for a Mac writter/reader is required

Ciao