Bad loginhook script hangs the machine after login

So, I was exploring with synergy and found about this LoginHook. I made a script as advised here: http://synergy2.sourceforge.net/autostart.html (Second method for OSX).

At first script provided in tutorial didn't work out, as synergy started without -f (no-daemon) seemingly does nothing, and does not even give an error message.. So without giving it a proper thought I added the -f flag. Now as I do login on any user, screen hangs as it runs the script (and I can move the mouse around over synergy client, so at least that works... )

So how can I get my hands on that script without normal login? Safe Boot mode didn't help, and I wasn't able to connect via SSH. Is there any way besides reinstalling the whole system?

Oh and I'm running with Leopard on oldish G5 powermac, if that helps

 

Ah worked it out myself, with a little help from someone who mentioned how to start from disk on startup

So solution worked as follows:

1. Inserted installation DVD
2. Booted up, with C pressed to start up from disk
3. Opened terminal within the installer
4. $ diskutil mountDisk /Volume/<hdd name>
5. Navigated to my script and removed it.
6. reboot

So thanks for the help, and hope this helps anyone who might try their luck