Got that darn "Please insert Disc 4" installer bug while installing KotOR 1 on WinXP SP3. I've made backups, but I had to return the discs to my friend.
I solved the problem with that solution I stated before. Now, after I finish my PS2 Disc extractor, my LegoRR Hook and some stuff for LEGOLAND, I might have a little free extra-time to finish off KOTOR 1.