I was not able to find the software you asked for, but I can immagine that the phone maybe are old and therefore there is no "PC-Suite" for the phone. I suggest that you e-mail to the Samsong company and ask them for the software. You can do it trough here :http://ars.samsung.com/customer/form/formmail/SEUK/input.jsp?SITE_ID=112&PROD_ID=79
What I did find on Samsung home site is that they have another software called Pc-Studio, but there i could not find your phone model number here are some links i did find :
here is one software from samsung, Pc Studio
You can download it direct from here under model number SGH-G810 :http://www.samsungmobile.co.uk/supports/softwaremanuals/software.do?sw_type=SW&phone_model=SGH-G810
There are 2 downloads on the site, one is PC-Studio
and the other is device install.
Just click on the Pc Studio and a window will ask you if you would like to : run or save or cancel the download. Click on save and find the "desktop" folder and click on save. Now the file is downloaded to your desktop and just double click on the file on your desktop to begin the installation. Follow the instructions on the screen
You can also find these to manuals here for sgh g810 : http://www.samsungmobile.co.uk/supports/softwaremanuals/software.do
I will adwice you to contackt Samsung before you try with these software ( they dont have your model number). If you still not have the connection to the mobile you can try to download the other software on the link above. But I mean that it is included on the PC Studio software.
I can see that the internet are full with your question but no answer, most of the links are going to Samsung homepage. Try to contact Samsung on the above link
Hope that helpsPlease rate my answer