Its slow because your runnign it from the ram... duh
No offense, but your posts aren't really very "helpful" content wise
Just saying "if you like it stay" isn't what he needs, he needs explaining to get comfortable with it, wether he likes it or not
And its slow because its running from CDROM, not HDD
Running purely from ram would be VERY fast!
That is the reason we use RAM after all!
Once you're booted into the UI with the Live CD, you can run the programs that come pre-installed to see if you're comfortable with the OS.
Just try doing basic things, like making an office doc, opening a miniature game, finding the control panel, terminal, perferences for things, desktop background, maybe some media files... Internet, maybe access network shares..
Once you get the hang of the OS, you can start to venture into more advanced things such as installing programs, and working with Wine.
There should be an "install" icon on the desktop that will launch a graphical installer, of which should allow you to choose to repartition your HDD with windows, and a seperate ubuntu partition. It should take care of the boot loader itself.
just take your time, read the prompts fully before making decisions, and when in doubt, the default is usually the safest with ubuntu!