The version of the novell client you're talking about is like 5 years old or so.  The current Novell Client32 is 4.91 SP4 or something like that.

Anyway, the 4.83 client should still have an "advanced" button on the GINA.  Click that, and go to the Windows tab, and select another user or domain or something.

If you have no backdoors into the local environment, as in a user other than Administrator with local Administrators group membership, your user may well have FUBARed the whole mess.

If you boot into safe mode WITHOUT NETWORKING you should not get the Novell client, but still will have to contend with logging into the local machine.

Novell client login is just a gina gui - you can reset it back to the normal windows one, but that will do little or nothing to help you with your current instance problem (which is getting past the pgp disk AND resetting the password in the SAM)

I haven't played with pgpdisk since the 6.x days, and didn't even know they had added boot-time protection to it, but - here is how I would approach the problem.

1) build a WinPE disk suitable for the ox installed on the pc
2) install to said disk a SAM reset/editing tool to recover the local admin password
3) log an install of pgp desktop and note where it places files outside of its own dirs and what registry entries it makes; transfer these to the WinPE cd and burn
4) boot from winpe cd, attempt to mount drive; if that succeeds, run the SAM editing tools against the unlocked drive, then reboot and see if it worked

of course, the mount process assumes you have a copy of the key used to secure the pgpdisk and/or the password for it.