ok, this is getting easier. instructions for firefox (on your desktop):
type in about:config in the title bar.
right click, select new/string. enter "general.useragent.override" for the preference, and "Mozilla/4.0 (compatible; MSIE 6.0; Windows 98; PalmSource/Palm-TunX; Blazer/4.3) 16;320x448" as the value.
this fools the server into thinking that you're connecting from a palm device.
navigate to http://get.epocrates.com/
click "install now"
save to your location of choice, and move setup.prc to your sd card.
install setup.prc from your sd through garnet.
hth, enjoy.