We need to know what bootloader you are currently using, and what
problems you have before we can really help

it is lilo only, redhat linux 7.0 does not have grub.
probs. I-partition type ....same partition type is used by solaris as
linux swap partition
II- drive geometry does not allow solaris to accept the linux
partition after solaris installation is over.post installation just
gives error saying "invalid boot...." and does not boot linux from
solaris boot manager.

Yeah, is it lilo or grub and what kind of trouble are you having?

it is lilo only, redhat linux 7.0 does not have grub.
probs. I-partition type ....same partition type is used by solaris as
linux swap partition
II- drive geometry does not allow solaris to accept the linux
partition after solaris installation is over.post installation just
gives error saying "invalid boot...." and does not boot linux from
solaris bbot manager.