Change Icon-set (Gnome 2.8)

[The Clam]

Hi
After looking and seaching through the forum I can't find the answers to my questions:
1) How do I change icon set?
I've downloaded a new set from gnome-look.org, but can't figure out how to install it...
2) How do I change the size of the desktop icons?

//The Clam

[Nerderello]

try
Preferences / Themes

then Theme details then click on the Icon tab

You effectively make a Custom Theme.

Nerderello

[cranst]

I tried this and it ignored my icon switch. In fact, the title bars of nautilus were the only things that changed with the custom theme.

[Stormblazer]

Are you sure that was an icon theme? Gnome theming has three parts to it: The GTK2 themes, which affect what buttons and such look like; The window manager themes for Metacity (the default window manager for Gnome); and the icon set.
Make sure you switched the icon set and not just the metacity theme (which is what affected the titlebars in nautilus).