You can install sap ecc 6.0 sr2 in your laptop without losing windows vista original software which will come along with laptop. You should have minimum 4GB ram and 320 GB Hard Disk Drive in your laptop to do this type of installation. I will do this installation online by taking your laptop control over Internet with the help of yours. Please write a comment to this post, if you are interested.
You can watch ecc 6.0 installation on your laptop from your location while i do. So you also can learn installation of sap ecc 6.0 sr2 without paying extra money. You should have Internet connection and software dump with you to have this facility of installation. This installation normally takes approximately 18 to 20 hours.
I do this installation by taking your desktop in my control. So that i can access all of your files and folders. I can use the software dump which is copied to your laptop or desktop by you according to my instructions. I do this installation in a virtual machine, so that you can use your windows vista for your home / office operation as it is without disturbing actual work.