Just to let you know, a lot of people seem to be having problems with Wine on Ubuntu 8.04 Hardy Heron. A new security feature was added that disables the first 64KB of memory. If you are having trouble running Wine, try running the following from a terminal:
Then run Wine again. If this fixes it for you, you need to edit your sysctl.conf file to make this change permanent:
(replace gedit with the editor on your system, e.g. mousepad for xubuntu)
Edit the line "vm.mmap_min_addr = 65536" and set the value to 0.
I am having more problems than just this "preloader failed" error on ubuntu, but I had no such problems with xubuntu for some reason!
Ed.