1. OSes coexistence
can i install solaris 8 on my pc's 3th primary harddisk partition without damage the user and boot datas of installed operation system? and does i have to install Solaris 8 within several G(such as 8G) size of the harddisk? the following is partition table of my harddisk:

primary partition 1 (3G): Windows 98 SE, FAT32
primary partition 2 (4G): SCO Openserver 5.0.6
primary partition 3 (5G): FAT32 (some Windows files)
logical partition 1 (5G): Windows 2000 Server, NTFS
......

2. booting floppy disk
there are some files like Sol8dca.img and s8i-boot.IMZ. it seems write them into floppy disk and then use to boot and install Solaris, am i right ? and how i can write them into floppy disk?

Thanks!

This doesn't answer your question, but doesnt solaris cost thousands of dollars?

Solaris is/was available on the cheap. I bought the media kit for a whopping $85 back in 2000. At one time, the ISO images could be downloaded but I do not know if that is still true.

As for muliple OSs, for the greatest ease I would use SystemCommand as the OS selector. With SystemCommander, you can load most any operation system and SystemCommander will do the hard part of taking care of the various mbr records.