Copy the iTunes Music folder across into the Mac. The artist folders drop inside the iTunes Music folder. Open iTunes, it's my guess it will not see the songs at first, so ... go to Preferences which is under the iTunes word at top left of screen (next to the Apple icon.) Keyboard shortcut for 98% of mac programs to get to preferences is Command (Apple key) & Comma keys ⌘ ,. Go to Advanced -> disable Copy files to iTunes music folder, disable Keep Music folder organised. Close preferences. Now drag & drop your entire apple iTunes Music folder onto the Library icon at very top left of iTunes program. That will add them to iTunes. Now, go back to iTunes preferences & set it how you prefer .. such as Copy files to iTunes Music folder when adding. One thing I do not like about iTunes 8 is the Keep Music Folder organised will add prefix numbers to each song each time you edit them for any reason. Sometimes I end up with files with 03 03 03 filename, lol. This used to be optional in preferences but iTunes decided everyone wanted this so made it a part of Keep Library Organised option.

Then grab LW 4.18 & see how it runs. If problems let us know.

A utility you may or may not like is called Butler. It gives a menu of items from the menu bar. You can add favorite programs & folders, etc. But I'd suggest disabling various things on it so it does not use up too many system resources on your MacBook. Such as low ram for folders, cache updating every couple hours, rid of the application folder, only list the ones you wish. You have the Dock for most popular. Butler can offer 2nd fav.

BTW I would look at getting a hold of Parallels, so you can install any other OS such as windows/linux on there & run it in a window of its own. That's 'if' you have plenty of hard disk space. I've had two XP & one Win 2000 running at same time on my mac. Parallels is far superior to Mac's Boot Utility, with that you have to reboot into windows to use it, and it does not accept 64-bit XP. I presume your MacBook will be powerful enough for this.