For Vista Home Premium 32bit use this:
http://www.unet.fi/fransblog/wp-cont...ermsrv_sp1.zip
Steps to Add Remote Desktop to Vista Home Premium:
1. Download termsrv.zip (above)
2. Extract Termsrv.zip to a temp directory
3. Start “Command Prompt” in Administrator mode (Run As Administrator)
4. Run the corresponding batch file for your Vista edition
5. Allow TCP Port 3389 on Windows Firewall or any other firewall product.
6. Done
...however, that's to allow you to do it from XP Pro->Vista HP. If you just want to remote desktop from Vista HP to XP Pro them all you need is:
Start->All Programs->Accessories->Remote Desktop Connection
The client part (to connect to another machine) comes will (i think) all versions of Vista or can be freely downloaded.