#17 Gag installation

[syb-pi]

I'm a complete newbie so go easy!
Windows 98SE on first hard drive, Simply Mepis on
second hard drive. Tried to set up Gag but it will only
boot to Windows. Mepis says 'sector boot not found or
invalid'.
What am I doing wrong and how do I put it right?
Is it possible to uninstall Gag and then reinstall it?
Is there any documentation re installation - I seem to
have lost the first page giving faq etc and I didn't pay
enough attention to it when it first came up!
How can I get this info back without remaking another
floppy?

A lot of questions I know but if anyone can help I should
be very grateful.