you already did a install on a desktop. so you can do the basic stuff. go ahead with your laptop and see if everything works fine. mandrake is very kind on dual boots. it will do the hardwork for you on the bootloader. after install if any hardware is not recognised then you have to search for its drivers.
all the best
oh BTW if you want to remove linux just get into Windoz and format all the linux partitions, hmmmmm i dont understand why people want to remove linux and keep windows