Hallelujah!!!!

After spending about 12 hrs trying different things out, it finally worked! Not every device is exactly the same in terms of s/w, h/w and f/w, but for me Method C (supplied by vulcan) on treo f/w faq (URL is http://coljac.net/treo_firmware_faq.html) worked. It didn't work at first and I had to tinker with it a bit, but at last it worked.

If anyone who has this problem wants to talk about it, send an email to acg at imagine dot gr and I'll try to help.