Disclaimer: Note there are probable risk in flashing ROM. I didn't have any problems but don't say I din't warn you!
Here is a quick tutorial for those who can't use Samsung New PC studio for flashing their phone.
I't is quite simple actually. First you need to download new firmware. I downloaded version I7500XXIH8 from this link. Hope nobody removes this file from the server.
Then you need to download flash program called Odin Multi Down loader. My is version 3.95. If you can't find this file write to me!
Before connecting device in the computer you must start it in download mode.
To do this: when phone is powered off press VOLUME DOWN key + OK + power on
I used Windows XP under Windows 7 to flash my device. There was no problem with drivers. My OS recognized device as some gadget serial and installed modem drivers .
Now connect device to computer and wait for drivers to install. Picture bellow shoves you if everything is OK.
Click on the picture to make it bigger!
Now you must choose One Packege, find and select Orion.ops (Is part of Odin archive) and final find and select the firmware you wan't to update to. The file you got from link above must be extracted once. Extracted file is called: I7500XXIH8-PDA-CL53973-REV5(VIA).tar
That's IT. Now just press start and wait 5 min!
Follow me, if you thing this was useful.