If you've got Pentium III machines - you won't want to install windows 95 on to them if you going to connect to the internet. Windows 95 is notorious for being wide open to security vulnerabilities - you'd be better off with 98 (second edition).
A pentium III processor is blinding fast, Windows 95 won't know what's hit it - when you shut down, Windows writes important info to the hard drive from a temp. storage area called a cache.
Your computers will shut down before this has happened, Windows 98 has an update available that addresses this issue. Note also, Windows 98 still receives critical security updates, 95 does not.
You have modern machines, Windows 95 will not recognise much of your hardware and driver support from vendor websites may be poor. Believe me 98 is a better starting point.
If your worried about licensing issues, go to a high street dealer and ask if they'll do you a deal on 4 Windows 98 Second Edition OEM packages - but still expect to part with £100 or more!
I wouldn't use a WindowsXP boot floppy for anything other than XP.
To create a boot floppy from a Windows 98 machine, click on [start] --> [settings][control panel][add/remove programs][windows setup][create startup disc]
May be worded differently, but you'll find it (I'm using Win2k at mo)
If you get good copies of Windows 98 Second Edition (avoid the first edition, it's notoriously buggy) - it's easier to format your drives and install Windows from the CD.
Given you've got Pentium III's, your BIOS must support booting from CD.
Enter Del or F1 or whatever key your bios prompt you for when restarting your PC.
Use the arrow keys on the keyboard to move around, when 'Standard CMOS settings' or somthing like is highlighted, hit [return], move down to boot sequence and use the [page up] or [page down] keys to change your options, so that the CD-ROM is the first boot device.
Pressing F10 should prompt you to save your settings to CMOS and exit the bios.
Restart your machine with your Windows 98 second edition CD in the drive and your PC should boot from the CD - make sure no floppies are loaded!
If your PC won't boot from the CD, maybe the CD drive isn't setup right and isn't being recognised by the bios. This is down to somethings called jumper settings, or may be because somebody has installed the hard drive and CD drive in incorrect postitions, either on the motherboard or the data ribbon cable - that flexible banded ribbon you see inside the machine.
Anyway, talking through jumper settings is hard to do remotely, find yourself a sympathetic friend.
Hope you find some of this info useful - don't get me wrong, I like Windows 95 in a stand alone environment, but wouldn't install it if I wanted internet access or if I had such a fast processor as you have.
p.s. other operating systems are available at a fraction of the cost of windows, but most casual pc users are put off learning something new/unfamiliar. Check out Linux, find a linux buddy and welcome to the revolution
daveB - LinuxWannabee