Is it possible to backup your LG GM750's contact-list without Outlook-Sync? Yes it is. At least you may use your old contacts after a hard-reset.
As there's no (official) way to extract your contacts from the mobile without using Microsoft's ActiveSync, you will face the following problem: ActiveSync keeps telling you to install a damn email-client, even tough, you have a working copy of Mozilla Thunderbird and no interest in replacing this with MS' Outlook (Express). Shit.
So the very simple way to "survive" the hard reset is this:
So this is what worked for me. I'm not responsible for any phone you f*ck up - if you don't know what you're doing - don't do it! Hope this post is helpful to some folks out there...