Can someone help me and direct me how to change the font on a k850i, i know it can be done but i just don't know how. thanks in advance

yes dude its possible
for that you need to have
1.a2uploader if you are using a2000 phone (i.e;k850i,c902 and some others, i dnt knw all) download it from this forum.
2.open the a2uploader and press "file system" it will ask you to connect your phone. switch off your phone and by pressing "c" on phone plug the usb cable into the phone.

3.now it will show your phones file system in that , go to
tpa/preset/system/fonts.

4.there you will find "font.xml" file delet it and copy the font files you have downloaded from any ones along with the font.xml and paste it there
tpa/preset/system/fonts/

5.After that click on "shutdown sf" and disconnect your phone , remove and reinsert the battery.
6.now switch on your phone and you will find your new working fonts.

enjoy ...........!!!