Success to a certain extent check out this bug report from RedHat
http://bugzilla.redhat.com/bugzilla/...g.cgi?id=36940
I used mem=exactmap mem=640K@0 mem=143M@1M
Install starts an will proceed in text mode but wont recognise the onboard video which is ok because I've got other video cards that should work.
This only works for RedHat 8.0 Mandrake 9.0 just freezes with those mem options.