have you defragged your windows partition? that would be the first step before resizing w/ any partition manager.
the automatic partition doesnt work and the manual partition will partition my whole hardrive including windows
i could be wrong, but, i believe you have that backwards. i would think auto partition would wipe the whole drive, and, manual should give you some options as to how to partition, or resize, ...etc.
I tried downloading partition magic but it doesn't seem to work properly
partition magic will cause problems if you have not defragged the file sys. i
have even seen partition magic corrupt a file sys after the defrag was done correctly.
i will suggest you do some reading at the redhat site for install help/ dual boot. you can find info here.
hope that helps.