Had probs with mine booting into X cause of the Radeon 9800 Pro .. here's what to do to get to the prompt.
when grub pops up press e
use the arrow keys to gotot the second line it should look something like this
"kernel /vmlinuz-2.4.22-1.2115.nptl ro root=LABEL=/ rhgb"
press e again (this enable you to edit the line
change the line t look like this ;
"kernel /vmlinuz-2.4.22-1.2115.nptl ro root=LABEL=/ rhgb init 3"
remove the " 's
then press b to boot
bingo you got init 3 .. if you have a Radeon 9800 Pro and are getting lockups on booting to X do the above steps then install the ati driver for XFree 4.3, run fglrxconfig .. reboot .. and bingo
Also a suggestion if you dont have 3d hardware acceleration .. when running fglrxconfig answer yes to use the external agpgart module, ATI's seems to be broke.
hope this has helped