Just burn them to a CD or copy them to a USB memory stick. Writeable CD's are literally pennies apiece, and uou can get a large USB memory stick for $10 or less.
You won't be able to transfer most programs. They will have to be installed from the original media.
1. Make sure that you have a username with the same password on each Windows system.
2. Turn on Windows File and Printer Sharing on the target Windows system. Make sure both Windows systems reside in the same workgroup. Make sure that the Windows firewall allows for Windows File and Printer Sharing.
3. Pick a directory and create a network share, making sure to set the proper Read-Write permissions for the username in (1).
4. On the Windows system that is the source of your files, go to Network Neighborhood (or My Network Places, or whatever it's called now), browse the network, double click on the other Windows system's computer icon, double click on the share, and then copy.
5. Turn off Windows File and Printer Sharing on both Windows systems if you intend to use either or both of them on untrusted networks.
* This procedure assumes you have a functioning, ad-hoc wireless network established between both Windows systems with static, private IP addresses set.