Hello friends, I had previously asked for your advice on the purchase on my new laptop. I must thank you all for your suggestions and advice. I've ordered for the Dell Studio 15 Laptop with a P8600 Processor, 4Gb RAM, 512 ATI Radeon Graphics Card & 500 GB Hard Drive. I should probably get it by next week. Anyways, let me come back to my post. I wish to install multiple OS on my lappy ... that is: Windows Vista, Ubuntu & OpenSolaris. Will installing 3 OS retard my system's performance in any way? Secondly, can I install all the 3 OS in the same drive? Also, if I need to install the OS in different drives, what should be the suitable size of each drive for it's required OS for best performance?