Linux swap partitions can live anywhere, even inside a file.

I'm possibly too optimistic. Some prerequisite are there but the whole process doesn't seem to be fully finished yet :
http://hub.opensolaris.org/bin/view/...EP_Reqts_Scope
http://bugs.opensolaris.org/bugdatab...bug_id=6644364
http://bugs.opensolaris.org/bugdatab...bug_id=6880217
http://hub.opensolaris.org/bin/view/...+on/2009070201

vinaytp,

It is possible to install more than ten (10) Linux distributions all installed in logical partitions with windows on any of the three available primary partitions. And multi-boot them by a single grub installed somewhere among the ten linuxes; there is no need to install grub or any bootloader for the remaining nine (9) linux distros, so long as grub controls the MBR, and it only needs to chainload the built-in ntloader of Windows. The limitation of grub to multi-boot systems theoretically depends only on the limit of the MBR, EBR (or MPBR) that holds record of partitions; it is not inherent in grub nor in linux.

Neither Linux nor Grub care about "Primary partition", only Windows (and Gate?s) are limited to that stupidity. I suppose if a new MBR convention holds 1,024 partition records then Grub can multi-boot scattered linux kernels about that number because grub merely passes the order based on its record and list.

One (1) primary partition is what a Windows needs; with two (2) primary partitions Windows is happy to have one extra; with three (3) primary partitions, well, Linux doesn't need any of them!

Hope this helps.

@ malekmustaq :

May be you want to read this :
http://justlinux.com/forum/showthread.php?t=144295

" .. booting 100+ systems of Dos, Windows, Linux, BSD and Solaris "
by Saikee.

Slightly off topic as limited to (Open)Solaris and BSD but ZFS allows a virtually unlimited number of different booting environments to be installed. Grub ability to display hundreds or even thousands of menu entries is probably the limiting factor.

.
@ knudfl,
Yes I have read your linked page. Thank you.

@jlliagre,
Yes I agree with your inference. Thank you.

But what is most important here is:

vinaytp is your problem solved now? If not yet then you can appraise us what you encountered and we try to help if within our means to do so.

Good luck to all.