Adobe Photoshop 6

I have Adobe Photoshop 6, which I've put on my iBook G4 from the installation disk I used on my old iMac Desctop. Curiously, the tools have been reduced, for instance, I no longer have a 'magnetic lasso'. It's the same installation disc that provided these tools on the older machine. Has anybody any ideas how I can get them back. PS. I have to use Adobe 6 in Classic!

Since you mentioned Classic, I'm assuming you have some version of system 10?

Yes, I have system 10. It's just that Adobe 6 always seems to require Classic. I assume it's because it's my old programme (from a desktop that's years old). I don't use it often enough to warrant the expense of an update.