Scott,
If you were not using the laptop for midi files or mp3s, then live recording will using Acid Pro, or any of the other programs would involve nothing more than a one button push to record.
As for scrolling the music, it's not really necessary to scroll at all. If you wished, you could scan the music into the computer in page format, then just select the next page with the touch of the laptop's page down buttom. You can also scan single pages of the same song into MS Word to screen size, then name them sequentially-- On Broadway1, On Broadway2, On Broadway3, etc. There are lots of options, all of which make more sense than lugging books around and trying to remember what song is in a particular book, then turning to the page, then setting up the keyboard, all of which takes lots of valuable time.
Good Luck,
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)