Need to install red hat linux on existing windows vista OS as dual boot

HI ALL,

I need to install linux on already existing windows vista OS.
I tried to install linux,am getting error while creating patitions,

i)selected manula patition with grude option..
after that when i m selecting free space to create mount points,
its giving error
"could not allocate requested partitions:partition failed:could not allocate partitions as primary partions".

Please help me ..how to proceed with the installation..

Thanks
Jack

Jack,

Can you list down your partitions including partitions of Windows?

Cheers

Partition table would be very helpful.

Also keep in mind you can't have more than 4 primary partitions, some vendor PC's (Dell etc) have a hidden primary partition as well.