I don’t have the problems you have.
I have windows ttf fonts installed and have changed the bytecode interpreter to 18 in sysconfig and have very nice looking fonts in all applications using KDE.
some of the steps will have changed a little what with the changes in yast2 and moving from KDE3 to KDE4 but I’m sure you’ll work it out.
MSfonts can be found in yast2 but do not include tahoma - if you have a windows disk around somewhere it should be on that.
There is a link on teh above page to a package that includes the Tahoma fonts. Haven’t tested it with 11.3 though.