[CentOS] booting CentOS in rescrue mode from USB (+over network)

Sun Aug 12 11:19:50 UTC 2007
Martin Minka <martin.minka at gmail.com>

Hello,
is there a way to boot CentOS 4.5 from USB flash key in rescue mode ?
The prefered solution would be to have booting part of CentOS started by 
SysLinux and download the content of CD1 from a network server (HTTP), 
like Anaconda is able to use command "method".

Best regards,
Martin