I don't understand, you are trying to lose the PC addiction but you switched to Slackware, the distro that encourage you to *be* a PC addicted :-) (Learning the CLI, how things works, the boot process, etc).
Anyway, I'd recommend KDE instead of fluxbox because it's more user friendly and more similar than Windows. About the PSP, I don't know if the system recognizes the PSP as a mass storage device, if so, you need to be in the 'plugdev' group to properly use your device (basically you plug that in, and KDE will ask if your want to mount it, like Windows).
Open a terminal and type 'su' then enter the root password, then type 'gpasswd -a [username] plugdev'. Then reboot your machine (or log out and log back in).