OS (windows Xp) will not let me.
Why will it not? What is the error message? How are you trying to transfer them?
There are lots of ways of moving files.
A simple and popular way to copy files and share files amoung your devices. This will depend on you internet connection speed.
https://www.dropbox.com/
Using iTures to transfer files:
http://support.apple.com/kb/HT4094?viewlocale=en_US&locale=en_US
Files Connect -- The swiss army knife of remote file connect
https://itunes.apple.com/us/app/files-connect/id404324302?mt=8
Windows File server
http://itunes.apple.com/us/app/filebrowser-access-files-on/id364738545?mt=8
"In education and business users increasingly expect to be able to access their data anytime, anywhere and from any device."
http://www.minnow.it/
This thread has good info.
https://discussions.apple.com/thread/3708341?tstart=0
How to transfer files from your iPad to your PC with iPad to Computer Transfer
http://www.iphone-mac.com/how-to-transfer-and-sync-contents-from-ipad-to-pc.html
Try the combo of:
Diskaid on your computer and FileAppPro on your iPad
Good old FTP
FileApp and FileApp Pro