Can we install Solaris 10 in NTFS in x86
 

Can we install Solaris 10 in NTFS in x86.

I don't understand the question. You mean you want to install Solaris over an NTFS partition on an x86 machine? Or do you want to use something like vmware server to create a virtual machine, then install Solaris on the virtual machine?

Solaris 10 will have it's own filesystem (not NTFS) with a unix like structure. I'm not sure if it will run natively on x86 architecture or not.

Actually i have a P4 system with 512MB RAM and 160GB HDD. I partioned the disk as NTFS. Can we install with this config?

I think solaris will probably erase the NTFS partition (because NTFS is a microsoft filesystem -- linux won't install on NTFS either) and reformat the drive with a Sun filesystem (not sure what they use), but you should be able to install it on the machine according to their specs for Solaris 10.

Sun uses ufs (and now zfs...which is REALLY cool...)

As already stated, Solaris can't use NTFS as its root file system. The usual way is to shrink the existing NTFS partition to make room for a Solaris one. If you do not want to touch the existing partition, you can still install Solaris with the help of VMware or similar virtualization application. Solaris would still use ufs and possibly zfs filesystems but residing on files stored on your NTFS filesystem.